1976     Montreux, Switzerland

1980     Innsbruck, Austria

1982     Trento, Italy

1984     Seattle, USA

1986     Vienna, Austria

1988     Byron Bay, Australia

1990     Vienna, Austria

1992     Chiba, Japan

1994     Buffalo, USA

1996     Köln, Germany

1998     Nairobi, Kenya

2000     Vancouver, Canada

2002     Helsinki, Finland

2004     Peurto de la Cruz, Spain

2006     Hong Kong