Norway is a founding member of the United Nations (UN), the North Atlantic Treaty Organization (NATO), the Council of Europe and the European Free Trade Association (EFTA). Norway issued applications for accession to the European Union (EU) and its predecessors in 1962, 1967 and 1992, respectively. While Denmark, Sweden and Finland obtained membership, the Norwegian electorate rejected the treaties of accession in referendums in 1972 and 1994.