2000
Heilbronn,
Germany
2002
Riga,
Latvia
2004
Turku,
Finland
2006
Devens, MA,
United States
2008
Vancouver, B.C.,
Canada
2010
Heilbronn,
Germany
2012
Dublin,
Ireland
2014
Lecco,
Italy
2016
Wroclaw,
Poland
2018
Waterloo,
Canada
1. United States Canada Canada United States Japan Colombia Colombia United States Canada United States
2. Canada Sweden United States Canada Australia Canada United States Canada United States Colombia
3. Finland Latvia Sweden Australia United States United States Canada Colombia Colombia Canada
4. Sweden Finland Japan Finland Colombia Australia Germany Austria The Netherlands Germany
5.    Finland  Canada Sweden Italy Germany France The Netherlands
6.    Australia  Great Britain Italy Sweden  New Zealand Japan
7.    Great Britain  Finland Japan Australia  Germany Australia
8.       Finland Japan  Switzerland New Zealand
9.       Latvia   Russia France
10.       Germany Great Britain  Czech Republic Italy
11.       Great Britain Russia  Japan Great Britain
12.       Israel France  Italy Mexico
13.       Austria Ireland  Australia China
14.       Belgium   Austria 
15.        Finland  Slovakia 
16.          Poland 
17.          Slovenia 
18.          Finland 
19.          Great Britain 
20.          Ireland 
Placing not known        Australia
Finland
France
Great Britain
Ireland
Israel
Latvia
The Netherlands
New Zealand
Switzerland
Poland