The long-term presence of refugees in Chad and the reduction in funding to provide assistance in recent years have led the humanitarian community to reconsider the approach to assistance of these populations. WFP and UNHCR, the Government's main partners in providing assistance to refugees, had conducted a "socio-economic categorization" in 2014 and 2015 in some refugee camps, and an update was decided for 2017. This update was designed to go beyond a simple categorization and focuses on identifying profiles of refugee households that can be empowered in the short to medium term and the factors that can foster this empowerment. The assessment covers 87,724 refugee households in Chad and was carried out during June-August 2017.
Areas hosting refugees in Chad. This includes 19 refugee camps and 9 villages.
Household and individual
All refugee households residing in Chad.
UNHCR PPG: 1TCDA, 1TCDB, 1TCDD
Sample survey data [ssd]
The survey's objective was to deliver representative data of all refugees living in Chad. The total population of refugees at the time of the survey was estimated at slightly below 90,000 households. These refugees were located in 19 refugee camps and 9 villages.
The survey applied a full-coverage (census) approach, i.e. no sample selection was made. The registration database served as the list frame. The total number of completed interviews was 87,724 households.
While the original data collection took a full-coverage approach, the public-release version of the dataset contains a systematically drawn sub-sample of this original data for reasons of statistical disclosure control. The total sample size in the dataset presented for public release is 8,772 households.
None.
Computer Assisted Personal Interview [capi]
All questionaires are provided in section "external ressources".
The dataset presented here has undergone light checking, cleaning and restructuring (data may still contain errors) as well as anonymization (includes removal of direct identifiers and sensitive variables, and grouping values of select variables). Moreover, it constitutes a sub-sample of the data originally collected.
Information unavailable.
IMPACT, in collaboration with UNHCR, conducted a sixth round of the Multi-Sector Needs Assessment (MSNA) of refugees in Iraq who live in and out of formal camps. The aim of the MSNA 2021 is to provide a household-level analysis of sector-specific needs and vulnerabilities of Syrian refugee and host community households. The MSNA 2021 sampling consists of samples of Syrian refugees in KR-I (where most Syrian refugees live), but also Anbar, Baghdad, Kirkuk and Ninewa (referred to as Centre-South, where most Syrian refugee households outside of KRI live), as well as host community households in KR-I given the high concentration of Syrian refugees in KR-I. Host communities were sampled to offer comparison and to include host communities in 3RP planning on the basis of identified needs and vulnerabilities by the MSNA. This assessment and its findings aim to support the prioritization across and within different sectors and is to be used as a basis for developing the 3RP Regional Refugee & Resilience Plan (3RP) 2022 This research sought to respond to the information need on multi-sectoral needs, movement intentions and the impact of COVID-19 on refugees’ lives, thus assisting humanitarian actors in organizing their response to protracted displacement of Syrian refugees across Iraq in the time of COVID-19.
Household and individual
Sample survey data [ssd]
Computer Assisted Personal Interview [capi]
The questionnaire contained the following sections: household demographics, information about the head of this household, education, protection, livelihoods, social cohesion, shelter, WASH, food security, health, intentions, communication, basic needs.
To ensure the centrality of refugees’ voices in discussions about their future, as well as to inform evidence-based inter-agency responses in support of host Governments, UNHCR is leading the regular implementation of intentions surveys with refugees from Ukraine, collecting primary data on their profiles, their current situation and intentions, and the factors influencing their decision-making.
The first, second and third regional intentions surveys were completed and the reports published in July 2022 (https://data.unhcr.org/en/documents/details/94176), September 2022 (https://data.unhcr.org/en/documents/details/95767) and February 2023 (https://data.unhcr.org/en/documents/details/99072). This data was collected during the fourth round, conducted between April and May 2023. The survey covered refugees hosted in countries in Europe.
A mixed methodological approach was used, combining two data collection modes. Around 3,850 refugee households were interviewed either through a phone-based survey, web-based survey or face-to-face interview. The data include a mix of Fresh
refugee households (i.e. not included in previous rounds) and Panel
households (i.e. those included in at least one of the previous rounds). All surveys used a harmonized questionnaire.
This data is an anonymous version of the original data collected and used for the primary analysis.
Europe
Households
Refugees from Ukraine
Sample survey data [ssd]
The sample includes households and individuals who completed this round as well as previous rounds (two and/or three) of the study (sample_type='Panel') and those who only participated in this round (sample_type = 'Fresh'). See more details in the report.
Other [oth]
The UNHCR Results Monitoring Surveys (RMS) is a household-level survey on people with and for whom UNHCR works or who benefit from direct or indirect assistance provided by UNHCR, including refugees and asylum seekers, internally displaced persons, returnees, stateless and others of concern. The objective of the survey is to monitor impact and outcome level indicators on education, healthcare, livelihoods, protection concerns, shelter, and water and sanitation. The results contribute to an evidence base for reporting against UNHCR's multi-year strategies to key stakeholders. This RMS took place in Peru from April 2023 to May 2023 at national level.
Household and individual
Sample survey data [ssd]
Computer Assisted Personal Interview [capi]
The questionnaire contained the following sections: Survey Information , Socio-economic Indicators & Mobility, Information on the well-being of the household, Habitable and affordable housing, Habitable housing and access to basic services, Health Services and Social Protection, Perceptions on safety and gender-based violence.
To strengthen and promote an evidence-based protection response, UNHCR and its partners have been implementing a protection monitoring exercise since May 2022 to regularly collect and analyze data about the profiles, needs and intentions of refugees from Ukraine and monitor changes over time. The exercise covers the following countries that have received refugees from Ukraine: Belarus, Bulgaria, Hungary, Republic of Moldova (5,035), Poland, Romania and Slovakia.
The protection monitoring involves household-level interviews conducted at border crossing points, reception and transit centres, collective sites, and assistance points in major cities using a structured questionnaire. Trained enumerators from UNHCR and partners collect data in face-to-face interviews. While respondents are randomly selected to reduce bias, the sample is considered a non-probability sample and results should be considered indicative, meaning they cannot be extrapolated to the population of refugees from Ukraine. The result reflects the refugees' situation and intentions at the time of data collection.
This dataset includes 541 household interviews conducted in Hungary between May and December 2022. It is an anonymous version of the original data collected and used for the primary analysis.
Countrywide
Households
Refugees from Ukraine
Sample survey data [ssd]
Households were randomly sampled at border crossing points, reception and transit centres, collective sites, and assistance points in major cities. While households were randomly sampled, the sample is considered non-probability.
Face-to-face [f2f]
Structured questionnaire implemented using UNHCR's mobile data collection tool, Kobo Toolbox
The UNHCR Results Monitoring Survey (RMS) is a household-level survey covering people who are directly or indirectly assisted by UNHCR. In India, respondents included the refugees and asylum seekers registered with UNHCR. The survey did not cover the refugees registered with the government and the people in refugee like situations. The objective of the survey is to monitor impact and outcome level indicators on education, healthcare, livelihoods, protection concerns, shelter, and water and sanitation. The results contribute to an evidence base for reporting against UNHCR’s multi-year strategies to key stakeholders.
The RMS can be implemented in any operational context. A standard structured questionnaire has been developed for the RMS, which can be conducted as a stand-alone survey or flexibly integrated with other data collection exercises. The questionnaire was adapted to the India context and programme objectives by including additional modules from the Health Access and Utilization Survey. A mixed methodology of remote and in-person interview was applied to allow for inclusion of respondents in areas not accessible to data collectors. Delhi, Hyderabad and Mewat were visited physically. The data includes indicators collected at both the household and individual (household-member) level. The survey covered 558 households amounting to 1932 individuals.
Households
Refugees and Asylum Seekers registeredby UNHCR in India 2024
Sample survey data [ssd]
Computer Assisted Personal Interview [capi],Computer Assisted Telephone Interview [cati]
The aim of the survey was to assess displaced people's access to protection support during the pandemic and absence of in-person services. To do so, the survey assessed awareness and usage of major communication and information channels between refugee communities and UNHCR, identified unaddressed protection issues amongst respondents, and asked about awareness and use of alternative sources for support. The survey targeted registered refugees in the greater Jakarta area as in-person services were suspended for significantly longer here than elsewhere in the country. 426 responses were gathered using IVR (Interactive Voice Response). Only refugees with an active phone number registered were included in the sample. The results paint a picture of these three topics separately as well as identify hidden caseloads and there existing support opportunities.
Jakarta
Individuals
Registered Refugees in Jakarta metropolitan area, 2022
Sample survey data [ssd]
1071 phone numbers were sampled from ProGres database to get 400 responses
Computer Assisted Telephone Interview [cati]
The Vulnerability Assessment Framework (VAF) is a key tool used by humanitarian and development organizations in Jordan. It contributes to coherent vulnerability identification and programme delivery across sectors. It was designed in 2014 with a focus on Syrian refugees residing outside of camps.
For the fifth bi-annual VAF population study in 2022, 6,427 refugee households residing in host communities were randomly sampled across all governorates to explore thematic and sectoral vulnerabilities for refugee populations of all nationalities within Jordan. This data was collected in person between July 2021 and October 2021.
Whole country host communities (excluding camps).
Household, Case (family), Individual
Sample survey data [ssd]
The stratified sampling strategy was developed jointly with the World Bank and designed to generate the most precise statistics possible and at the lowest possible cost and to allow for representativeness at a margin of error below 5%. Stratification was planned along two variables: nationality (Syrian, Iraqi and Other) and location. Syrians were represented across the twelve governorates, while non-Syrians were represented across the regions of Jordan; Amman, Central/outside Amman (consisting of Balqa, Madaba and Zarqa), North (consisting of Ajloun, Irbid, Jerash, Mafraq) and South (consisting of Aqaba, Karak, Tafilah, Ma'an). The sample was randomly drawn from cases registered in the ProGres registration database administered by UNHCR Jordan. The sample includes refugees residing in urban, peri-urban and rural settings and excludes those living in refugee camps.
Face-to-face [f2f]
Questionnaire contained the following sections: Household Demographics, Shelter, WASH, Consumption and Expenditure6, COVID-19 KAP7, Financial Situation, Health, Education, Livelihoods, and Child Labour.
The UNHCR Results Monitoring Surveys (RMS) is a household-level survey on people with and for whom UNHCR works or who benefit from direct or indirect assistance provided by UNHCR, including refugees and asylum seekers, internally displaced persons, returnees, stateless and others of concern. The objective of the survey is to monitor impact and outcome level indicators on education, healthcare, livelihoods, protection concerns, shelter, and water and sanitation. The results contribute to an evidence base for reporting against UNHCR’s multi-year strategies to key stakeholders. This RMS took place in Brazil from September 2022 to November 2022 at national level.
Household and individual
Sample survey data [ssd]
One third of the surveys have been conducted with households located in the state of Amazonas, one third with households located in the state of Roraima, and the remaining third was distributed in other Brazilian states. Based on this quota, the respondents were chosen randomly from the list of possible participants.
Computer Assisted Personal Interview [capi]
The questionnaire contained the following sections: Survey Information , Socio-economic Indicators & Mobility, Information on the well-being of the household, Habitable and affordable housing, Habitable housing and access to basic services, Health Services and Social Protection, Perceptions on safety and gender-based violence.
The UNHCR Results Monitoring Survey (RMS) is a household-level survey conducted with people directly or indirectly assisted by UNHCR. In Malaysia refugee households were surveyed. The objective of the survey is to monitor impact and outcome level indicators on education, healthcare, livelihoods, protection concerns, shelter, and water and sanitation. The results contribute to an evidence base for reporting against UNHCR’s multi-year strategies to key stakeholders.
The RMS can be implemented in any operational context. A standard structured questionnaire has been developed for the RMS, which can be conducted as a stand-alone survey or flexibly integrated with other data collection exercises. The questionnaire was adapted to the Malaysia context and programme objectives and focused on e.g., health, education and employment. The data includes indicators collected at both the household and individual (household-member) level. The survey covered 1103 household containing 3027 individuals, and results are statistically representative.
National
Households
Registered Refugees in Malaysia 2023
Sample survey data [ssd]
Simple Random
Computer Assisted Telephone Interview [cati]
The Vulnerability Assessment Framework (VAF) is a key tool used by humanitarian and development organizations in Jordan. It contributes to coherent vulnerability identification and programme delivery across sectors. . It was designed in 2014 with a focus on Syrian refugees residing outside of camps. This dataset collected between November and December 2021 presents the first efforts in expanding the scopes to the Zaatari and Azraq refugee camps. Residents of both Azraq and Zaatari camps were randomly sampled to explore trends and vulnerabilities specific to the camp context. As the questionnaire was first used to collect the data in the urban setting, it was tailored for the refugee camps context to account for the camp residents’ living circumstances, allowing for a deeper understanding of this specific group. A total of 10,141 individuals, representing 2,208 families living in 1,620 households, were interviewed in person.
Azraq and Zaatari camps
Household, Case (family), Individual
Sample survey data [ssd]
In order to ensure that the sample is representative of the refugee population living in both camps, a stratified random sampling method was used, with two strata: Azraq and Zaatari. Random sampling aims to reduce selection bias and ensure that our respondents have the same characteristics as the entire population on average. A random sample of families was selected for each camp using UNHCR's ProGres registration database. This sample was then proportionally distributed across the villages in Azraq and districts in Zaatari. Even though sampling was conducted at the family unit, all members in the household were interviewed, including other cases/families living in the same household, and individuals pending registration with UNHCR
Face-to-face [f2f]
Questionnaire contained the following sections: Household Demographics, Shelter, WASH, Consumption and Expenditure6, COVID-19 KAP7, Financial Situation, Health, Education, Livelihoods, and Child Labour.
Mexico has seen a significant influx of individuals and groups engaged in human mobility, often using similar routes and means of transport for a variety of reasons. This diverse population includes asylum seekers, refugees, victims of human trafficking, unaccompanied and separated children, stateless persons, and migrants in vulnerable situations. To better understand these dynamics, a protection monitoring initiative was conducted to identify trends, demographic profiles, and the protection and food security needs of people on the move. The collected data focused on the drivers of human mobility, the characteristics of individuals in transit, the risks encountered during their journeys, conditions in transit countries, as well as food security, child protection, and future movement intentions.
Group and individual
Event/transaction data [evn]
Computer Assisted Personal Interview [capi]
Questionnaire contained the following sections: Demographics, Children, Family status, Country of origin, Host country, Journey, Arrival, Needs.
The 2023 Multi-Sector Needs Assessment (MSNA) in Slovakia presents findings from a regional interagency multi-sectoral assessment conducted with Ukrainian refugees in Slovakia from July to August 2023. The assessment, carried out by SHC and IOM, aimed to capture the needs of and access to basic services for refugees, identify service gaps, and understand refugees' priorities for the coming year to inform response planning. Using a structured questionnaire, the assessment surveyed purposively selected households of refugees from Ukraine, stratified by geographic area and accommodation type. Key topics included health, protection, food security, education, livelihoods, gender-based violence, mental health, cash assistance, and legal needs. As a key source of information for response planning, the 2023 MSNA provides insights into the experiences and priority needs of Ukrainian refugees in Slovakia.
Country
Household
Households fleeing Ukraine: The assessment aimed to evaluate the profiles and urgent needs of these households as part of a regional exercise for the Ukraine Situation.
Sample survey data [ssd]
The 2023 Multi-Sector Needs Assessment (MSNA) in Slovakia utilized a simple random sampling method to survey 1,000 households (comprising both private accommodations and collective sites). 80% of the sample was drawn from households in private accommodations, and 20% from collective sites. The sample was stratified by geographic area and accommodation type, using data from the cash registration database and considering district-level refugee population density. This approach ensures that each household had an equal probability of selection, providing representative results of the refugee population's needs across Slovakia.
Face-to-face [f2f]
Income, food consumption, expenditures, assets, community relations, wellbeing, resilience, mental health, health, accommodation, protection, and education
The Zimbabwe: Results Monitoring Survey (RMS) 2023 is a household-level survey conducted by UNHCR to monitor key impact and outcome indicators among refugees, asylum seekers, and other forcibly displaced persons in Zimbabwe. The survey was implemented in two key locations: Harare and the Tongogara Refugee Settlement in Chipinge, using computer-assisted personal interviews (CAPI) to collect data on mobility, housing, basic needs, disability, and safety. A total of 226 households were surveyed in Harare with a 100% response rate, while 524 out of 600 sampled households responded in Tongogara, achieving an 87% response rate.The data, collected between October and November 2023, provides essential insights into the living conditions and challenges faced by the forcibly displaced population. Rigorous data processing and validation ensured high quality, making this dataset a valuable resource for guiding UNHCR’s operations, informing policy decisions, and supporting evidence-based programming in Zimbabwe.
Harare and Tongogara Refugee Settlement, Zimbabwe
Household
Refugees, asylum seekers, and other forcibly displaced persons residing in Harare and Tongogara Refugee Settlement.
Sample survey data [ssd]
Probability: Stratified sampling. Households were sampled using systematic sampling based on a listing exercise, ensuring comprehensive and representative coverage of the refugee population in Harare and Tongogara.
Face-to-face [f2f]
The questionnaire covered key indicators on health, education, livelihoods, protection, and basic needs, tailored to the local context and operational requirements. Indicators were assessed at both household and individual levels.
The UNHCR Results Monitoring Surveys (RMS) is a household-level survey on people with and for whom UNHCR works or who benefit from direct or indirect assistance provided by UNHCR, including refugees and asylum seekers, internally displaced persons, returnees, stateless and others of concern. The objective of the survey is to monitor impact and outcome level indicators on education, healthcare, livelihoods, protection concerns, shelter, and water and sanitation. The results contribute to an evidence base for reporting against UNHCR's multi-year strategies to key stakeholders. This RMS took place in Trinidad and Tobago from October 2022 to November 2022 at national level.
Household and individual
Sample survey data [ssd]
Computer Assisted Personal Interview [capi]
The questionnaire contained the following sections: Survey Information , Socio-economic Indicators & Mobility, Information on the well-being of the household, Habitable and affordable housing, Habitable housing and access to basic services, Health Services and Social Protection, Perceptions on safety and gender-based violence.
The UNHCR Results Monitoring Survey (RMS) is a household-level survey on persons of concern (PoC) to UNHCR directly or indirectly assisted by UNHCR, including refugees and asylum seekers, internally displaced persons, returnees, stateless and others of concern. The objective of the survey is to monitor impact and outcome level indicators on education, healthcare, livelihoods, protection concerns, shelter, and water and sanitation. The results contribute to an evidence base for reporting against UNHCR’s multi-year strategies to key stakeholders.
The RMS can be implemented in any operational context. A standard structured questionnaire has been developed for the RMS, which can be conducted as a stand-alone survey or flexibly integrated with other data collection exercises. The data includes indicators collected at both the household and individual (household-member) level, and results are statistically representative.
This RMS took place in South Africa between April and June 2022. The population of interest included all PoCs to UNHCR in South Africa, and the sample frame was taken from UNHCR's registration datasase (ProGres). Data subjects were intereviewed over the phone. This dataset is the anonymous version of the original data.
South Africa
Individuals and Households
Persons of concerns (PoCs) to UNHCR in South Africa.
Sample survey data [ssd]
UNHCR's registration database (ProGres) was used as a sample frame to identify households of interest. Households were stratified by registration group and sex of head of household. A total of 1,050 households were contacted for an interview via telephone. Enumerators were able to secure 388 interviews, of which 385 were completed. Non-response was due to three main factors: inability to reach the respondent with the phone number provided (about 50%), no answer (about 30%) and households reached were not persons of concern to UNHCR, most likely the wrong number (about 6%).
Computer Assisted Telephone Interview [cati]
The UNHCR Results Monitoring Survey (RMS) is a household-level survey covering people who are directly or indirectly assisted by UNHCR. In the Tajikistan the survey covered rejected Asylum-Seekers and refugees. The objective of the survey is to monitor impact and outcome level indicators on education, healthcare, livelihoods, protection concerns, shelter, and water and sanitation. The results contribute to an evidence base for reporting against UNHCR’s multi-year strategies to key stakeholders.
The RMS can be implemented in any operational context. A standard structured questionnaire has been developed for the RMS, which can be conducted as a stand-alone survey or flexibly integrated with other data collection exercises. The questionnaire was adapted to the Tajik context and programme objectives by removing, e.g. questions related to camp settings. The data includes indicators collected at both the household and individual (household-member) level. The survey covered 340 household amounting to 1790 individuals.
National
Households
Registered Refugees in Tajikistan 2023
Sample survey data [ssd]
Simple Random Sampling
Computer Assisted Telephone Interview [cati]
The UNHCR Results Monitoring Survey (RMS) is a household-level survey on persons of concern (PoC) to UNHCR directly or indirectly assisted by UNHCR, including refugees and asylum seekers, internally displaced persons, returnees, stateless and others of concern. The objective of the survey is to monitor impact and outcome level indicators on education, healthcare, livelihoods, protection concerns, shelter, and water and sanitation. The results contribute to an evidence base for reporting against UNHCR’s multi-year strategies to key stakeholders.
The RMS can be implemented in any operational context. A standard structured questionnaire has been developed for the RMS, which can be conducted as a stand-alone survey or flexibly integrated with other data collection exercises. The data includes indicators collected at both the household and individual (household-member) level, and results are statistically representative.
National
Households and individuals
Registered Refugees in Kyrgyzstan 2022
Sample survey data [ssd]
Simple random, 82 of 116 households were interviewed
Face-to-face [f2f]
The UNHCR Results Monitoring Survey (RMS) is a household-level survey covering people who are directly or indirectly assisted by UNHCR. In the Philippines, respondents included forcibly displaced people, stateless people and those at risk of statelessness. The objective of the survey is to monitor impact and outcome level indicators on education, healthcare, livelihoods, protection concerns, shelter, and water and sanitation. The results contribute to an evidence base for reporting against UNHCR’s multi-year strategies to key stakeholders.
The RMS can be implemented in any operational context. A standard structured questionnaire has been developed for the RMS, which can be conducted as a stand-alone survey or flexibly integrated with other data collection exercises. The questionnaire was adapted to the Philippines context and programme objectives by including, e.g. addtional questions on access to protection services, information and community leadership structures. A mixed methodology of remote and in-person interview was applied to allow for inclusion of respondents in areas not accessible to data collectors, e.g. Visayas and Mindanao. The data includes indicators collected at both the households and individual (household-member) level. The survey covered 640 household amounting to 2291 individuals.
Households
Forcibly displaced people, stateless people and people at risk of statelessness in te Philippines 2023
Sample survey data [ssd]
Computer Assisted Personal Interview [capi],Computer Assisted Telephone Interview [cati]
The Refugee children’s education survey collects data on children attending school as well as their school experience. The survey creates a roster of children who are currently attending school, as well as information about children who are not yet enrolled but wish to be in local public schools for the upcoming academic year. The information of children who wish to enroll will be shared with the relevant authorities for school enrollment.
The purpose of of the second module of the survey is to understand school children’s self-evaluation (as well as parents’ evaluation) of their school performance and experience. The survey is specifically designed to assess the interventions taken by schools and parents for children who have experienced bullying or require additional support in their studies. The results will inform UNHCR’s follow-up actions and interventions.
For the school year 2023-2024, information on 45 children of school age were surveyed in April and May of 2023.
National
Households
Refugee children in China 2023
Census/enumeration data [cen]
Not Applicable
Face-to-face [f2f]
The long-term presence of refugees in Chad and the reduction in funding to provide assistance in recent years have led the humanitarian community to reconsider the approach to assistance of these populations. WFP and UNHCR, the Government's main partners in providing assistance to refugees, had conducted a "socio-economic categorization" in 2014 and 2015 in some refugee camps, and an update was decided for 2017. This update was designed to go beyond a simple categorization and focuses on identifying profiles of refugee households that can be empowered in the short to medium term and the factors that can foster this empowerment. The assessment covers 87,724 refugee households in Chad and was carried out during June-August 2017.
Areas hosting refugees in Chad. This includes 19 refugee camps and 9 villages.
Household and individual
All refugee households residing in Chad.
UNHCR PPG: 1TCDA, 1TCDB, 1TCDD
Sample survey data [ssd]
The survey's objective was to deliver representative data of all refugees living in Chad. The total population of refugees at the time of the survey was estimated at slightly below 90,000 households. These refugees were located in 19 refugee camps and 9 villages.
The survey applied a full-coverage (census) approach, i.e. no sample selection was made. The registration database served as the list frame. The total number of completed interviews was 87,724 households.
While the original data collection took a full-coverage approach, the public-release version of the dataset contains a systematically drawn sub-sample of this original data for reasons of statistical disclosure control. The total sample size in the dataset presented for public release is 8,772 households.
None.
Computer Assisted Personal Interview [capi]
All questionaires are provided in section "external ressources".
The dataset presented here has undergone light checking, cleaning and restructuring (data may still contain errors) as well as anonymization (includes removal of direct identifiers and sensitive variables, and grouping values of select variables). Moreover, it constitutes a sub-sample of the data originally collected.
Information unavailable.