January 1990

Hong Kong 

January 1991

Boston MA, USA

January 1992

Rio de Janeiro, Brazil

January 1993

Paris, France

January 1994

Sydney, Australia

January 1995

Seoul, Korea

January 1996

San Franciso CA, USA

August 1996

Pretoria and Kruger Park, South Africa

July 1997

Łódź, Poland 

July 1998

Dover Convention Center, Barbados 

July 1999

Tallinn, Estonia

August 2000

London, England

July 2001

Las Vegas Nevada USA

July 2002

Lisbon, Portugal

July 2003

Mexico City, Mexico

July 2004

Cairo, Egypt

July 2005

Santiago, Chile

July 2006

Beijing, China

July 2007

Berlin, Germany