*in October 2018 – For the updated version (beginning of 2023) please click here.
Yes: European Union, NATO, Schengen Area, Eurozone
- Belgium,
- Estonia,
- France,
- Germany
- Greece,
- Italy,
- Latvia,
- Lithuania,
- Luxembourg,
- Netherlands,
- Portugal,
- Slovakia,
- Slovenia,
- Spain
Yes: European Union, NATO, Schengen Area – No: Eurozone
- Denmark,
- Czech Republic,
- Hungary,
- Poland
Yes: European Union, NATO – No: Eurozone, Schengen Area
- Bulgaria,
- Croatia,
- Romania,
- United Kingdom
Yes: European Union, Schengen Area, Eurozone – No: NATO
- Austria,
- Finland,
- Malta
Yes: NATO, Schengen Area – No: European Union, Eurozone
- Iceland,
- Norway
Yes: European Union, Eurozone – No: Schengen Area, NATO
- Cyprus,
- Ireland
Yes: Schengen Area – No: European Union, Eurozone, NATO
- Switzerland
Yes: European Union, Schengen Area – No: Eurozone, NATO
- Sweden
Yes: NATO – No: European Union, Eurozone, Schengen Area
- Albania,
- Montenegro,
- Turkey
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