Country Date: December 31
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| Years | Country |
|---|---|
| 1982 - 1983 | Cameroon |
| 1984 | United States |
| 1985 | Pakistan |
| 1986 | Thailand |
| 1987 - 1988 | India |
| 1989 - 1990 | Congo (Democratic Republic) |
| 1991 - 2002 | United States |
| 2003 | Japan |
| 2004 - 2007 | United States |
| 2008 | Northern Mariana Islands |
| 2009 - 2023 | United States |
| Country | Years |
|---|---|
| Cameroon | 2 |
| Congo (Democratic Republic) | 2 |
| India | 2 |
| Japan | 1 |
| Northern Mariana Islands | 1 |
| Pakistan | 1 |
| Thailand | 1 |
| United States | 32 |
| 8 countries | |