| 22 | 2018 | Saint Malo, France |  |
| 21 | 2016 | Toronto, Canada |  |
| 20 | 2014 | Stuttgart, Germany |  |
| 19 | 2012 | Urbana-Champaign, Illinois, US |  |
| 18 | 2010 | Barcelona, Spain |  |
| 17 | 2008 | Berkeley, California, US | |
| 16 | 2006 | Copenhagen, Denmark | |
| 15 | 2004 | Chapel Hill, North Carolina, US | |
| 14 | 2002 | Delft, Netherlands | |
| 13 | 2000 | Calgary, Candada |
| 12 | 1998 | Hellas, Greece |
| 11 | 1996 | Cancun, Mexico |
| 10 | 1994 | Heidelberg, Germany |
| 9 | 1992 | Denver, Colorado, US |
| 8 | 1990 | Venice, Italy |
| 7 | 1988 | Cambridge, Massachusetts, US |
| 6 | 1986 | Lisbon, Portugal |
| 5 | 1984 | Burlington, Vermont, US |
| 4 | 1982 | Hannover, Germany |
| 3 | 1980 | Oxford, Mississippi, US |
| 2 | 1978 | London, United Kingdom |
| 1 | 1976 | Princeton, New Jersey, US |
