| Année d'adhésion | Pays | % Correct |
|---|---|---|
| 1963 | Canada | 100%
|
| 1961 | Etats-Unis | 100%
|
| 1961 | Mexique | 97%
|
| 1986 | Belize | 94%
|
| 1961 | Costa Rica | 94%
|
| 1961 | Cuba | 94%
|
| 1961 | Guatemala | 92%
|
| 1961 | Honduras | 92%
|
| 1968 | Nicaragua | 92%
|
| 1965 | Jamaïque | 89%
|
| 1961 | Haïti | 86%
|
| 1961 | Panama | 86%
|
| 1962 | Salvador | 86%
|
| 1964 | République Dominicaine | 83%
|
| 1994 | Dominique | 81%
|
| 1986 | Saint-Vincent-et-les-Grenadines | 81%
|
| 1962 | Trinité-et-Tobago | 81%
|
| 1972 | Antigua-et-Barbuda | 78%
|
| 1981 | Bahamas | 78%
|
| 1967 | Barbade | 78%
|
| 1992 | Saint-Christophe-et-Niévès | 78%
|
| 1965 | Sainte-Lucie | 75%
|
| 1969 | Grenade | 69%
|
| 1961 | Porto Rico | 61%
|
| 1961 | Guyana | 53%
|
| 1965 | Suriname | 50%
|
| 1988 | Aruba | 47%
|
| 1967 | Bermudes | 44%
|
| 2010 | Curaçao | 44%
|
| 1996 | Îles Vierges britanniques | 39%
|
| 1996 | Anguilla | 36%
|
| 1996 | Montserrat | 36%
|
| 1990 | Îles Caïmans | 31%
|
| 1996 | Îles Turques-et-Caïques | 19%
|
| 1987 | Îles Vierges des Etats-Unis | 14%
|