The analysis of the demographic dynamism of the population and its evolution over time rests on the quantification of demographic events via the implementation of demographic statistical operations whose main update sources are the Civil Registers, a census-type administrative register. The Migratory Movements Statistics (EMM) offer information on changes of residence whose origin or destination is in the municipalities of the Basque Country, as well as on other alternations of the municipal register: registration by omission and cancellations due to improper and duplicated registration.