Irvine, California 1982
Banff, Alberta 1984
Miami, Ohio 1985
Olympia, Washington 1989
Houston, Texas 1991
Pittsburgh, Pennsylvania 1993
Las Vegas, Nevada 1995
Baltimore, Maryland 1997
Tucson, Arizona 1999
Tacoma, Washington 2000
Durham, North Carolina 2001
Denver, Colorado 2002
Providence, Rhode Island 2003
Victoria, British Columbia 2004
Houston, Texas 2005
St. Paul, Minnesota 2006
Baton Rouge, Louisiana 2007
Boise, Idaho 2008
Tallahassee, Florida 2009
Copenhagen, Denmark (World Congress) 2009
Portland, Oregon 2010
Phoenix/Tempe, Arizona 2011
Madison, Wisconsin 2012
Toronto, Ontario 2013
San Francisco, California 2014
GuimarĂ£es, Portugal (World Congress) 2014
Washington, DC 2015
Seattle, Washington 2016
Chicago, Illinois 2017
Riverside, California 2018
Columbus, Ohio 2019
Florianopolis, Brazil (World Congress) 2019
Ottawa, Ontario 2020 (CANCELLED)
Eugene, Oregon 2022
Boston, Massachusetts 2023
Denver, Colorado 2024
Oulu, Finland (World Congress) 2024
Pittsburgh, Pennsylvania 2025