Year Location[1][2][3] 2019 Cincinnati, OH 2018 Denver, CO 2017 Chicago, IL 2016 Columbus, OH 2015 Washington, DC 2014 Portland, OR 2013 Hartford, CT 2012 Madison, WI 2011 Lexington, KY 2010 Pittsburgh, PA 2009 Portland, OR 2008 Madison, WI 2007 San Jose, CA 2006 Knoxville, TN 2005 Albuquerque, NM 2004 Providence, RI 2003 Boulder, CO 2002 Burlington, VT 2001 Madison, WI