Central and Eastern Europe Soviet Union; the independent states in former Yugoslavia (which were not considered part of the Eastern bloc); and the three Baltic states – Estonia, Latvia, Lithuania (which chose not to join the CIS with the other 12 former republics of the USSR). The CEE countries are further subdivided by their accession status to the European Union (EU): the eight first-wave accession countries that joined the EU on 1 May 2004 (Estonia, Latvia, Lithuania, Czech Republic, Slovakia, Poland, Hungary, and Slovenia), the two second-wave accession countries that joined on 1 January 2007 (Romania and Bulgaria) and the third-wave accession country that
Referendums related to the European Union by 51.9% to leave the European Union. Greenland, an autonomous territory of Denmark, voted to leave the EC in a referendum in 1982 by 53% of voters. In 1972, four countries held referendums on the subject of the 1973 enlargement of the European Communities. Denmark, Ireland, and the United Kingdom were admitted as members of the EC, acceding on 1 January 1973. Two referendums were held in EU countries to permit them to ratify the Single European Act. In 1994, four countries, and one dependency, held referendums on membership of the EU, resulting in the 1995 enlargement of the European