- 2024 - Nara, Japan / Hybrid
- 2023 - Reading, UK / Hybrid
- 2022 - Philadelphia/Hybrid
- 2021 - Online
- 2020 - Online
- 2019 - Macau, SAR
- 2018 - Montréal, Canada
- 2017 - Baltimore, Maryland, USA
- 2016 - LLandudno, North Wales, UK
- 2015 - Tucson, Arizona, USA
- 2014 - Miami, Florida, US
- 2013 - Lucerne, Switzerland
- 2012 - San Francisco
- 2011 - Montreal
- 2010 - Athens
- 2009 - Boston
- 2008 - Turku
- 2007 - Washington, D.C.
- 2006 - Victoria
- 2005 - Amsterdam
- 2004 - Chicago
- 2003 - Vienna
- 2002 - New York
- 2001 - Boulder
- 2000 - Montreal
- 1999 - Venezia
- 1998 - Santa Fe
- 1997 - Philadelphia
- 1996 - London