Although the initial plan for the 2011 Census was to carry out an improved version of the previous census in 2001 with a combination of a traditional census (with an exhaustive collection of information) and the use of information from administrative registers, the impact of the economic crisis has forced a revision of the whole census operation with fundamental changes in the methodology (it will finally be based on population and administrative information supplemented with the collection of new survey data) and a significant reduction in the number of census agents to do the fieldwork (from 42.000 in 2001 to 5.000 in 2011).
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