On 1 January 2020, the population of the European Union (EU) with 27 Member States was estimated at 447.7 million, down by 12.8% as compared with 513.5 million in 28 Member States on 1 January 2019. This decrease is mainly due to the withdrawal of the United Kingdom (on 1 February 2020), which led the population of the EU to decrease by 13%. The total EU27 population change was positive with 0.9 million more inhabitants during 2019, due to net migration.