Instituto Nacional de Estadística
  • Type of survey: continuous on an annual basis
  • Population scope: population living in main family dwellings
  • Geographical scope: the entire national territory
  • Reference period of the results: the first quarter of the year
  • Reference period of the information: most of the variables investigated refer to the twelve and three months prior to the time of the interview
  • Sample size: some 2,500 census sections, around 25,000 dwellings
  • Type of sampling: three-stage with stratification of the first stage units. The first stage units are the census sections, the second-stage units, the main family dwellings. In the third stage, a person aged 16 or over is selected in each dwelling. Information is also obtained from all children aged 10 to 15.

Methodological files and questionnaires

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  • Terms glossary
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