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
1. United States United States United States Sweden Canada United States United States United States Canada United States
2. Canada Germany Canada Canada United States Germany Canada Canada Australia Canada
3. West Germany Japan Germany United States The Netherlands Canada Great Britain New Zealand Japan Great Britain
4. Norway  Great Britain Great Britain Japan Austria Sweden Australia United States Denmark
5.    Italy The Netherlands  Great Britain Finland Great Britain Great Britain Japan
6.    Switzerland Germany  Italy Japan Japan New Zealand 
7.    Japan Switzerland  Switzerland Germany France France Australia
8.     Japan  Japan The Netherlands Italy Germany 
9.        Australia Germany  France
10.         Venezuela  
11.           Finland
12.           
13.           Belgium
14.           
15.           New Zealand
16.           
17.           Singapore
Placing not known