2001
Akita,
Japan		 2005
Duisburg,
Germany		 2009
Kaohsiung City,
Chinese Taipei		 2013
Cali,
Colombia		 2017
Wroclaw,
Poland		 2022
Birmingham,
United States
1. Canada United States United States United States United States United States
2. United States Australia Japan Australia Colombia Australia
3. Japan Canada Australia Canada Canada Colombia
4. Sweden Japan Canada Colombia Australia Germany
5. Finland Germany Great Britain Japan Japan Japan
6. Germany Finland Chinese Taipei Great Britain Poland France
7.       Canada
8.       Great Britain