New statistics from Eurostat, the EU’s statistical office, show that in 2011, 783 100 persons acquired citizenship of an EU27 Member State, down by 4% compared with 2010. This decline, which occurred after three consecutive years of increase, is mainly due to the decreases recorded in four of the five largest countries in terms of granted citizenships: the United Kingdom (177 600 persons, -9% compared with 2010), France (114 600, -20%), Spain (114 600, -7%) and Italy (56 200, -15%), while only Germany (109 600, +5%) registered an increase. These five countries together still accounted for almost three quarters of all citizenships granted by the EU27 Member States. 

Source: Eurostat

As regards the characteristics of the new citizens in the EU27, there was a slight predominance of women (52%) in 2011. The median age of persons granted citizenship was 32.5 years, with almost a third aged less than 25 years and nearly half aged 25 to 44, while those aged 55 or over accounted for less than 7%.  

See here the Eurostat News Release of 27 November 2013 and here more information on Acquisition of citizenship statistics from Eurostat.