| País | Número de firmas |
Spain  | 144 |
Afghanistan  | 7 |
United States of America  | 6 |
Brazil  | 5 |
Chile  | 2 |
Colombia  | 2 |
Japan  | 2 |
Ascension Islands  | 1 |
Andorra  | 1 |
Argentina  | 1 |
Canada  | 1 |
Algeria  | 1 |
Georgia  | 1 |
Gambia  | 1 |
Italy  | 1 |
Mexico  | 1 |
Poland  | 1 |
Portugal  | 1 |
Seychelles  | 1 |
Thailand  | 1 |
United Kingdom  | 1 |
| Total | 182 |
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