| Kraj | 1 Edycja | 2 Edycja | 3 Edycja | 4 Edycja | 5 Edycja | 6 Edycja | 7 Edycja | 8 Edycja | 9 Edycja | 10 Edycja | 11 Edycja |
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| Albania |
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| Austria |
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| Belgia | |
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| Bułgaria |
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| Chorwacja | |
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| Cypr |
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| Czechy |
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| Czarnogóra |
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| Dania |
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| Estonia | |
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| Finlandia |
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| Francja |
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| Grecja |
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| Hiszpania |
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| Holandia (Niderlandy) |
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| Irlandia |
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| Islandia |
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| Izrael |
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| Litwa |
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| Niemcy |
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| Norwegia |
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| Polska |
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| Portugalia |
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| Północna Macedonia |
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| Rosja |
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| Rumunia |
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| Serbia |
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| Słowacja |
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| Słowenia |
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| Szwajcaria |
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| Szwecja |
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| Turcja |
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| Ukraina |
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| Węgry |
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| Wielka Brytania |
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| Włochy |
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| Liczba krajów uczestniczących | 22 | 26 | 25 | 31 | 28 | 29 | 23 | 22 | 30 | 31 | 31 |