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 Italy New Zealand Japan
7.    Great Britain  Finland Japan Australia Japan Germany Australia
8.       Finland Japan  Switzerland New Zealand
9.       Latvia  France Russia France
10.       Germany Great Britain Finland Czech Republic Italy
11.       Great Britain Russia Latvia Japan Great Britain
12.       Israel France Great Britain Italy Mexico
13.       Austria Ireland Switzerland Australia China
14.       Belgium  Australia Austria 
15.        Finland Ireland Slovakia 
16.         New Zealand Poland 
17.         The Netherlands Slovenia 
18.         Poland Finland 
19.         Israel Great Britain 
20.          Ireland 
Placing not known