The number of individuals included in the survey was 18,857 in 2001 and 14,568 in 2006. The questionnaire consists of six modules providing information on demography, employment, income, education, health and housing. The multi-year dimension of the dataset enables production of a panel analysis evaluating the evolution of the main socio-economic conditions of beneficiary households compared to non-participants. Beneficiary households have a lower income per capita and are more likely to come from rural areas, where poverty is widespread.