2010
Florence,
Italy
2013
Toronto,
Canada
2015
London,
Great Britain
2018
Perth,
Australia
1. Canada United States United States United States
2. Japan Canada Canada Italy
3. Germany Australia Japan Australia
4. Colombia Germany Great Britain Germany
5. Australia Great Britain Austria Canada
6. Great Britain Japan New Zealand Japan
7. Switzerland Austria Germany Great Britain
8. Sweden Italy Ireland Switzerland
9. Finland Colombia Australia Colombia
10. Austria New Zealand Switzerland Ireland
11. Russia Switzerland Colombia Austria
12. Ireland France Italy Philippines
13. France Dominican Republic Belgium New Zealand
14. Italy Ireland Denmark Singapore
15. Slovakia Mexico Sweden Chinese Taipei
16.    Mexico China
17.    Poland 
18.    Spain 
19.    Philippines 
20.    The Netherlands