@misc{Eurostat2017d,
author = {Eurostat},
title= {Population and social conditions: Demography and migration : Population: Population on 1 January by age, sex and broad group of citizenship (migr_pop2ctz)},
year = {2017d},
URL = {http://ec.europa.eu/eurostat/data/database},
publisher = {Eurostat},
address = {Luxembourg},
}