1994 – Stanford University
1995 – Stanford University
1996 – Stanford University
1997 – Wellesley College
1998 – Emory University
1999 – Kent State University
2000 – University of Pennsylvania
2001 – Stanford University
2002 – University at Buffalo
2003 – Ferris State University
2004 – Princeton University
2005 – Georgia Institute of Technology
2006 – Bowling Green State University
2007 – University of California San Diego
2008 – University of New Brunswick
2009 – St. Cloud State University
2010 – Western Washington University
2011 – Yale University
2012 – The Claremont Colleges
2013 – Purdue University
2015 – Michigan Technological University
2016 – University of Nevada, Las Vegas
2017 – Western Carolina University
2018 – University of Colorado Boulder