2010
Florence,
Italy
2013
Toronto,
Canada
2015
London,
Great Britain
2018
Perth,
Australia
2019
Heidelberg,
Germany
1. Great Britain United States United States United States 
2. Belgium Canada Australia Japan 
3. Germany Japan Canada Canada 
4. Poland Venezuela Germany Australia 
5. Slovakia Ireland Great Britain Singapore 
6. Austria Austria South Africa Germany 
7. Italy Great Britain Japan Great Britain 
8. Ireland Australia Chinese Taipei Colombia 
9.   Colombia India New Zealand 
10.   Germany Philippines Denmark 
11.   Chinese Taipei Ireland Malaysia 
12.    Colombia India 
13.     Hong Kong 
14.     China