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1st World Congress - Paris, France - 1994
2nd World Congress - Yokohama, Japan - 1995
3rd World Congress - Orlando, Florida -1996
4th World Congress - Berlin, Germany - 1997
5th World Congress - Seoul, Korea -1998
6th World Congress - Toronto, Canada - 1999
7th World Congress - Turin, Italy - 2000
8th World Congress - Sydney, Australia - 2001
9th World Congress - Chicago, Illinois - 2002
10th World Congress - Madrid, Spain - 2003
11th World Congress - Nagoya, Japan - 2004
12th World Congress - San Francisco, California - 2005

13th World Congress London, United Kingdom October 8-12, 2006
14th World Congress Beijing, People’s Republic of China October 15-19, 2007

15th World Congress New York City, New York November 17-20, 2008

16th World Congress Stockholm, Sweden September 27-October 4, 2009