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 United States
2. Belgium Canada Australia Japan Japan
3. Germany Japan Canada Canada Singapore
4. Poland Venezuela Germany Australia Latvia
5. Slovakia Ireland Great Britain Singapore Canada
6. Austria Austria South Africa Germany The Netherlands
7. Italy Great Britain Japan Great Britain Australia
8. Ireland Australia Chinese Taipei Colombia Poland
9.   Colombia India New Zealand Czech Republic
10.   Germany Philippines Denmark Sweden
11.   Chinese Taipei Ireland Malaysia Colombia
12.    Colombia India Germany
13.     Hong Kong Great Britain
14.     China France
15.      Spain
16.      Italy
17.      Ireland
18.      South Africa
19.      Hong Kong
20.      China
21.      Mexico