European Union
EU (january 2014)
Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, The Netherlads, United Kingdom
EU-15
This is the European Union from 1995 to january 2004 (source). It is considered as the realization of a mature political union.Belgium, France, Denmark, Germany, Finland, Greece, Ireland, Italy, Luxembourg, The Netherlads, Austria, Portugal, Spain, United Kingdom, Sweden
EU-25
This is the enlargement of the EU in january 2004 with ten new member states, most of which from Central and Eastern Europe (CEE), referred to as NMS-10.EU-25 = EU-15 + NMS-10
Austria, Belgium, Denmark, Finland, France, Germany, Greece, Ireland, Italy, Luxembourg, Portugal, Spain, Sweden, The Netherlads, United Kingdom, Cyprus, Czech Republic, Estonia, Hungary, Latvia, Lithuania, Malta, Poland, Slovakia, Slovenia
EU-27
The accession of Bulgaria and Romania on 1 january 2007. In this constellation, the Lisbon treaty was signed in 2009.
Austria, Belgium, Denmark, Finland, France, Germany, Greece, Ireland, Italy, Luxembourg, Portugal, Spain, Sweden, The Netherlads, United Kingdom, Cyprus, Czech Republic, Estonia, Hungary, Latvia, Lithuania, Malta, Poland, Slovakia, Slovenia, Bulgaria, Romania
EU-28
Accession of Croatia 1 july 2013.EU-27 = EU-25 - NMS-12 + NMS-13
Austria, Belgium, Denmark, Finland, France, Germany, Greece, Ireland, Italy, Luxembourg, Portugal, Spain, Sweden, The Netherlads, United Kingdom, Cyprus, Czech Republic, Estonia, Hungary, Latvia, Lithuania, Malta, Poland, Slovakia, Slovenia, Bulgaria, Romania, Croatia
Other economic unions in Europe
Euro zone
Belgium, France, Germany, Finland, Ireland, Italy, Luxemburg, The Netherlands, Austria, Portugal, Spain, Greece, Slovenia, Cyprus, Malta, Slovakia, Estonia, Latvia
European economic area (EEA)
Iceland, Lichtenstein, Norway