1966 – New York City, New York USA
1968 – Paramus, New Jersey USA
1988 – Thorn Netherlands
1990 – Ewing, New Jersey USA
1992 – Thorn Netherlands
1994 – Gothenburg, Sweeden
1996 – Bowie, Maryland USA
1998 – Paris – France
2000 – Rio de Janeiro, Brazil
2002 – Praha – Czech Republic
2004 – Ewing, New Jersey USA
2006 – Wurtzburg, Germany
2008 – Florence, Italy
2010 – Cambridge, UK
2014 – Lannion, France
2018 – Egmont ann Zee, The Netherlands
2020 – Cancelled
2022 – Prague, Czech Republic