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METADATA :: Sample characteristics :: Spain (1981 1991 2001 Selected All )

Census Characteristics	1991
Title	Census of Population and Housing 1991, Spain
Census Agency	Instituto Nacional de Estadisticas (INE)
Population	The census includes persons who have a fixed residence in the national territory as well as those who are in the national territory at the time of reference, without omissions nor duplications.The persons who have their residency in Spain constitute the fixed population [population with rights]. The persons who are in the national territory at the moment of the census form the actual population [de facto].
Universe
De jure or de facto	De facto
Enumeration unit
Census day	1 March 1991
Field work period	1 March-1 April 1991
Enumeration forms used	There are five forms: general questionnaire, individual questionnaire, collective [dwelling] questionnaire, secondary dwellings with no registered dwellers, and 1990 building questionnaire.
Type of field work	The questionnaires are prepared to utilize the method of self-enumeration, with which the mission of the Agent is reduced, generally, to the tasks of delivering and collecting the questionnaires and verifying the correct completion of the same.
Respondent
Coverage
Microdata sample characteristics	1991
Sample microdata source	Integrated European Census Microdata
Sample design	Systematic stratified sampling
Sample unit	Dwelling
Sample fraction	5%
Sample fraction (private households)
Sample fraction (institutional households)
Sample size (person records)	1.931.458
Sample size (private households)
Sample size (institutional households)
Sample weights	Computed by census agency and should be used for most types of analysis
Units identified	1991
Dwellings	Yes
Vacant units	Yes
Households	Yes
Individuals	Yes
Group quarters	Yes
Settled/unsettled Population	-
Special populations	-
Unit definitions	1991
Dwellings	A dwelling is a structurally separate and independent location that, given the way it was built, rebuilt, transformed, or adapted, is conceived to be inhabited by persons, or, even if this is not the case, is effectively and actually inhabited at the time of the census.
Households	Group of people who, residing in the same dwelling, share expenses derived from the use of the dwelling and/or alimentation. Single person and multiperson households are to be considered.
Institutional population	-
Group quarters	Collective dwellings are those dwellings or buildings designed to be occupied by persons who do not constitute a family, subject to a common regime or authority, or gathered by common objectives or interests.
Unsettled population	-