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| DATE | NATION |
| 24 august 1949 | United Kingdom |
| France | |
| Belgium | |
| Netherlands | |
| Luxemburg | |
| Norway | |
| Denmark | |
| Iceland | |
| Portugal | |
| Italy | |
| U.S.A. | |
| Canada | |
| 18 february 1952 | Greece |
| Turkey | |
| 5 may 1955 | Germany |
| 30 may 1982 | Spain |
| 12 march 1999 | Poland |
| Czech Republic | |
| Hungary | |
| 1 may 2004 | Bulgaria |
| Estonia | |
| Latvia | |
| Lithuania | |
| Romania | |
| Slovenia | |
| Slovaquie | |
| 3 april 2008 | Albania |
| Croatia |