As small, open economies, all the Nordic countries (Denmark, Finland, Island, Norway and Sweden) have been well integrated in the regional and international economy. There have been moves to further intra-Nordic integration, such as, the NORDEK project in 1960s and the establishment of Nordic companies. Each of the five countries has had differing economic relationships with Europe, with Finland currently being the only country to have adopted the euro, and Iceland and Norway the only Nordic countries not to have become members of the EU.