2010
Florence,
Italy		 2013
Toronto,
Canada		 2015
London,
Great Britain		 2018
Perth,
Australia		 2019
Heidelberg,
Germany		 2023
Nottingham,
Great Britain
1. Canada United States United States United States United States United States
2. Japan Canada Canada Italy Canada Belgium
3. Germany Australia Japan Australia Italy Germany
4. Colombia Germany Great Britain Germany Japan Italy
5. Australia Great Britain Austria Canada Australia Japan
6. Great Britain Japan New Zealand Japan Colombia Canada
7. Switzerland Austria Germany Great Britain Belgium Great Britain
8. Sweden Italy Ireland Switzerland Great Britain Australia
9. Finland Colombia Australia Colombia Germany Colombia
10. Austria New Zealand Switzerland Ireland New Zealand New Zealand
11. Russia Switzerland Colombia Austria Austria Singapore
12. Ireland France Italy Philippines Ireland Austria
13. France Dominican Republic Belgium New Zealand Switzerland The Netherlands
14. Italy Ireland Denmark Singapore Denmark Ireland
15. Slovakia Mexico Sweden Chinese Taipei Russia China
16.    Mexico China Chinese Taipei 
17.    Poland  China 
18.    Spain  Panama 
19.    Philippines   
20.    The Netherlands