- 2024 Bath, United Kingdom
- 2023 Ciba, Japan
- 2022 Oslo, Norway
- 2021 St Petersburg, Russia
- 2020 St Petersburg, Russia
- 2019 Bath, United Kingdom
- 2018 Cluj-Napoca, Romania
- 2017 Rio de Janeino, Brazil
- 2016 Hong Kong
- 2015 Chiang Mai, Thailand
- 2014 Cape Town, South Africa
- 2013 Santa Marta, Columbia
- 2012 Mar del Plata, Argentina
- 2011 Amsterdam, Netherlands
- 2010 Astana, Kazakhstan
- 2009 Bremen, Germany
- 2008 Madrid, Spain
- 2007 Hanoi, Vietnam
- 2006 Ljubljana, Slovenia
- 2005 Merida, Mexico
- 2004 Athens, Greece
- 2003 Tokyo, Japan
- 2002 Glasgow, United Kingdom
- 2001 Washington, USA
- 2000 Taejon, Republic of Korea
- 1999 Bucharest, Romania
