| YEAR | MONTH | PLACE | COUNTRY |
| 1990 | August | Budapest | Hungary |
| 1991 | June | Skopje | Macedonia |
| 1992 | September | St. Just-le-Martel | France |
| 1993 | October | Omiya City | Japan |
| 1994 | June | Sydney | Australia |
| 1996 | February | Bratislava | Slovakia |
| 1997 | September | Istanbul | Turkey |
| 1998 | June | Havana | Cuba |
| 2002 | April | Philadelphia, PA | United States |
| 2004 | October | Beijing | China |