EU population exceeds the threshold of 500 million people due to migration 28.07.2010
According to a EUROSTAT release on 27th of July 2010, the total population of the 27 EU member states exceeded half billion people at the beginning of the year 2010. The increase of 1.4 million people in comparison with the previous year was due mainly to immigration (0.9 million net migration).
Details at http://epp.eurostat.ec.europa.eu/cache/ITY_PUBLIC/3-27072010-AP/EN/3-27072010-AP-EN.PDF