| 1 | 1993 | 8 | Australia, Belgium, Canada, Germany, Great Britain, New Zealand, Switzerland, United States |
| 2 | 2000 | 7 | Australia, Belgium, Canada, Great Britain, Ireland, Poland, United States |
| 3 | 1998 | 7 | Australia, Belgium, Czech Republic, Latvia, New Zealand, Switzerland, United States |
| 4 | 1990 | 7 | Australia, Belgium, France, Germany, Great Britain, Netherlands, United States |
| 5 | 1989 | 7 | Australia, Belgium, Germany, Great Britain, Italy, Netherlands, United States |
| 6 | 1987 | 7 | Australia, Belgium, Czech Republic, Great Britain, Italy, Netherlands, South Korea |
| 7 | 1999 | 6 | Australia, Belgium, Czech Republic, Denmark, Switzerland, United States |
| 8 | 1995 | 6 | Australia, Canada, Germany, Italy, New Zealand, United States |
| 9 | 1992 | 6 | Australia, France, Germany, Netherlands, New Zealand, Poland |
| 10 | 1991 | 6 | Australia, France, Germany, Italy, Netherlands, United States |
| 11 | 1988 | 6 | Australia, Belgium, Great Britain, Italy, Netherlands, New Zealand |
| 12 | 2003 | 5 | Australia, Canada, Great Britain, New Zealand, United States |
| 13 | 2001 | 5 | Australia, Lithuania, Norway, Poland, United States |
| 14 | 1994 | 5 | Australia, Germany, Italy, Netherlands, United States |
| 15 | 1985 | 5 | Australia, Belgium, France, Great Britain, Spain |
| 16 | 2011 | 4 | Australia, Germany, Russia, South Africa |
| 17 | 2002 | 4 | Australia, Belgium, South Africa, Sweden |
| 18 | 2017 | 4 | Australia, Great Britain, Netherlands, United States |
| 19 | 2018 | 4 | Australia, Colombia, Denmark, Great Britain |
| 20 | 1996 | 4 | Australia, Italy, Latvia, United States |
| 21 | 2019 | 4 | Australia, Canada, Great Britain, Norway |
| 22 | 2009 | 3 | Australia, Estonia, Great Britain |
| 23 | 2014 | 3 | Australia, Ireland, New Zealand |
| 24 | 2005 | 3 | Australia, Ireland, Lithuania |
| 25 | 2004 | 3 | Australia, Canada, Sweden |