Social Explorer; Eurostat: Technical Documentation
Eurostat collects demography and migration data from EU Members States' National Statistical Institutes (NSIs) and also from almost all non-EU Member States in Europe (including EFTA countries and Candidate countries to the EU). Data are collected at national and at regional level.
Countries supply demographic data to Eurostat on several occasions each year, which is then reflected in updates in the Eurostat database:
Countries may send updates of the data they previously provided throughout the year. Accordingly, updates in the Eurostat database may occur outside of the four major updates outlined here.