19th: Kyoto, Japan (2026)
18th: Milan, Italy (2024)
17th: Vancouver, Canada (2022)
16th: Dublin, Ireland (2018)
15th: Seoul, South Korea (2016)
14th: San Francisco, US (2014)
13th: Warsaw, Poland (2012)
12th: Beijing, China (2010)
11th: Montreal, Canada (2008)
10th: Mainz, Germany (2006)
9th: Evanston, US (2004)
8th: Tokyo, Japan (2002)
7th: Cambridge, UK (2000)
6th: Boulder, US (1998)
5th: Naples, Italy (1996)
4th: San Diego, US (1994)
3rd: Sydney, Australia (1992)
2nd: Paris, France (1990)
1st: Berkeley, US (1988)