The Municipal Register is the administrative register in which all of the persons who regularly reside in the municipality are recorded. Its compilation, maintenance, revision and safekeeping correspond to the respective Municipal councils and from its updating the Revision of the Municipal Register referring to 1 January each year is obtained. The fundamental purpose of this publication is to provide knowledge on the social and demographic structure of the population.  Different tables are provided on a national, Autonomous Community, provincial, population unit (Nomenclature) and census section level.