The Residential Variation Statistics (RVS) are compiled by the INE, basically from the exploitation of the information regarding registrations and cancellations due to changes of residence registered in the Municipal Registers, with variation dates from the reference year, and reflected in the INE register database up to the month of March (inclusive) of the year following the year of the study.
From these, all internal annual residential variations and part of the external ones are obtained in this way; the former are those produced between the different municipalities in Spain, and the latter are those movements from or to foreign countries.