1^st World Congress - Paris, France 1994
2^nd World Congress - Yokohama, Japan 1995
3^rd World Congress - Orlando, Florida, USA 1996
4^th World Congress - Berlin, Germany 1997
5^th World Congress - Seoul, Korea 1998
6^th World Congress - Toronto, Canada 1999
7^th World Congress - Turin, Italy 2000
8^th World Congress - Sydney, Australia 2001
9^th World Congress - Chicago, Illinois, USA 2002
10^th World Congress - Madrid, Spain 2003
11^th World Congress - Nagoya, Japan 2004
12^th World Congress - San Francisco, California, USA 2005
13^th World Congress - London, UK 2006
14^th World Congress - Beijing, Peoples Republic of China 2007
15^th World Congress - New York, New York, USA 2008
16^th World Congress - Stockholm, Sweden 2009
17^th World Congress - Busan, Korea 2010
18^th World Congress - Orlando, Florida, USA 2011