| 2021 | Brno, Czech Republic |
| 2020 | Rimini, Italy |
| 2019 | Singapore, Singapore |
| 2018 | Maastricht, Netherlands |
| 2017 | Rennes, France |
| 2016 | Vancouver, Canada |
| 2015 | Nice, France |
| 2014 | Cambridge, USA |
| 2013 | Zaragoza, Spain |
| 2012 | Krakow, Poland |
| 2011 | Hangzhou, China [/photos] |
| 2010 | Belfast, Northern Ireland |
| 2009 | Park City, Utah, USA [photos] |
| 2008 | Bologna, Italy [photos] |
| 2007 | Durham, North Carolina, USA [photos] |
| 2006 | Valencia, Spain [photos] |
| 2005 | Lyon, France |
| 2004 | Chicago, Illinois, USA [photos] |
| 2003 | Thessaloniki Chalkidiki, Greece [photos] |
| 2002 | Memphis, Tennesee, USA [photos] |
| 2001 | Rotterdam, The Netherlands [photos] |
| 2000 | Cambridge, Massachusetts, USA [photos] |
| 1999 | Hanover, Germany |
| 1998 | Cleveland, Ohio, USA |
| 1997 | Lund, Sweden [photos] |
| 1996 | Indianapolis, Indiana, USA |
| 1995 | Vienna, Austria |
| 1994 | Bethesda, Maryland, USA |
| 1993 | London, UK |
| 1992 | Durham, North Carolina, USA |
| 1991 | Venice, Italy |
| 1990 | Chicago, Illinois, USA |
| 1989 | Jerusalem, Israel |
| 1988 | Washington, DC, USA |
| 1987 | Leuven, Belgium |
| 1986 | Cambridge, Massachusetts, USA |
| 1985 | Linköping, Sweden |
| 1984 | Park City, Utah, USA |
| 1983 | Aachen, Germany |
| 1982 | Seattle, Washington, USA |
| 1981 | Florence, Italy |
| 1980 | Williamsburg, Virginia, USA |
| 1979 | Geneva, Switzerland |
| 1978 | Stanford, California, USA |
| 1977 | Rotterdam, The Netherlands |
| 1976 | St. Louis, Missouri, USA |
| 1975 | Rotterdam, The Netherlands |
| 1974 | Bethesda, Maryland, USA |
