2011 Paris, France (11 - 16 September 2011)
2010 Rome, Italy (29 August - 3 September 2010)
2009 Vancouver, Canada (30 August - 4 September 2009)
2008 Brussels, Belgium (31 August - 5 September 2008)
2007 Kyoto, Japan (30 September - 5 October 2007)
2006 Amsterdam, Netherlands (17 September - 22 September 2006)
2005 Buenos Aires, Argentina (11 - 16 September 2005)
2004 Vienna, Austria
2003 Sydney, Australia
2002 Oslo, Norway
2001 San Francisco, USA
2000 Munich Germany
1999 Eilat, Israel
1998 London, United Kingdom
1997 New Delhi, India
1996 Geneva, Switzerland
1995 Cannes, France
1994 Toronto, Canada
1993 Florence, Italy
1992 Cancun, Mexico
1991 Barcelona, Spain
1990 Stockholm, Sweden
1989 Rio de Janeiro, Brazil
1988 Amsterdam, Netherlands
1987 Brussels, Belgium
1986 New York, USA
1985 London, United Kingdom
1984 Buenos Aires, Argentina
1983 Venice, Italy
1982 Montreal, Canada
1981 Berlin, German Federal Republic
1980 Paris, France
1979 Copenhagen, Denmark
1978 Sydney, Australia
1977 Vienna, Austria
1976 Jerusalem, Israel
1975 London, United Kingdom
1974 Mexico-City, Mexico
1973 Lausanne, Switzerland
1972 Madrid, Spain
1971 Washington, USA
1970 Brussels, Belgium
1969 Rotterdam, Netherlands
1968 Montevideo, Uruguay
1967 Stockholm, Sweden
1966 Lisbon, Portugal
1965 London, United Kingdom
1964 Hamburg, German Federal Republic
1963 Paris, France
1962 Athens, Greece
1961 Jerusalem, Israel
1960 Basel, Switzerland
1959 Madrid, Spain
1958 Knokke, Belgium
1957 Vienna, Austria
1956 Rome, Italy
1955 Amsterdam, Netherlands
1954 Cologne, German Federal Republic
1953 Paris, France
1952 Brussels, Belgium
1951 Zürich, Switzerland
1950 Monaco
1948 Rome, Italy
1947 The Hague, Netherlands
1938 The Hague, Netherlands