1998
Minneapolis, MN,
United States		 2000
Heilbronn,
Germany		 2004
Turku,
Finland		 2008
Vancouver, B.C.,
Canada		 2012
Sakai,
Japan		 2016
London,
Great Britain
1. Canada United States United States Canada Canada United States
2. United States Canada Canada Japan Australia Australia
3. Germany Finland New Zealand United States Japan Canada
4. Brazil Great Britain Germany Australia United States France
5.   New Zealand Australia Great Britain Great Britain Great Britain
6.   Germany Czech Republic Germany Germany Japan
7.   Japan Great Britain France Philippines Philippines
8.   Switzerland Japan Chinese Taipei France Colombia
9.   Sweden Finland Italy Russia Czech Republic
10.   Austria Switzerland Colombia Colombia 
11.   Czech Republic Sweden Hong Kong Hong Kong 
12.   Ireland France Mexico China 
13.   Brazil South Africa  Finland Austria
14.      The Netherlands 
15.      South Africa 
16.       
17.       Belgium
18.       
19.       
20.       
21.       Denmark
22.       
23.       
24.       
25.       Israel
26.       India
27.       Finland
28.       Republic of Korea
29.       Mexico
30.       China
Placing not known