2010
Florence,
Italy
2013
Toronto,
Canada
2015
London,
Great Britain
2018
Perth,
Australia
2019
Heidelberg,
Germany
1. Australia United States Japan United States United States
2. Japan Japan United States Canada Japan
3. Great Britain Canada Canada Australia Canada
4. Canada Colombia Australia Colombia Colombia
5. Colombia Germany Germany Japan Italy
6. Ireland Great Britain Colombia Germany Germany
7. Finland Australia Sweden Singapore Switzerland
8. Germany Austria Great Britain Austria Great Britain
9.   Mexico New Zealand New Zealand Ireland
10.   New Zealand  Great Britain New Zealand
11.     Philippines Australia
12.      Belgium