1990
Oslo,
Norway		 1992
Utsunomiya,
Japan		 1994
Colchester,
Great Britain		 1996
Jönköping,
Sweden		 1998
Minneapolis, MN,
United States		 2000
Heilbronn,
Germany		 2004
Turku,
Finland		 2008
Vancouver, B.C.,
Canada		 2012
Sakai,
Japan		 2016
London,
Great Britain		 2024
Irvine,
United States
1. United States United States United States Sweden Canada United States United States United States Canada United States Canada
2. Canada Germany Canada Canada United States Germany Canada Canada Australia Canada United States
3. West Germany Japan Germany United States The Netherlands Canada Great Britain New Zealand Japan Great Britain Great Britain
4. Norway  Great Britain Great Britain Japan Austria Sweden Australia United States Denmark Japan
5.    Italy The Netherlands  Great Britain Finland Great Britain Great Britain Japan Colombia
6.    Switzerland Germany  Italy Japan Japan New Zealand  Australia
7.    Japan Switzerland  Switzerland Germany France France Australia Germany
8.     Japan  Japan The Netherlands Italy Germany  Venezuela
9.        Australia Germany  France New Zealand
10.         Venezuela   India
11.           Finland 
12.            
13.           Belgium 
14.            
15.           New Zealand 
16.            
17.           Singapore 
Placing not known