2022 Pittsburgh
2020&2021 UCLA
2019 Emory
2018 University of California Berkeley
2017 Oberlin
2016 Pennsylvania State University
2015 University of Illinois Urbana Champaign
2014 Western Washington University
2013 University of Chicago
2012 Ohio State
2011 Tufts
2010 Yale
2009 Rutgers
2008 University of British Columbia
2007 Princeton
2006 Josai International University
2005 Dartmouth
2004 University of Washington
2003 UCLA
2002 Purdue
2001 Tufts and Wellesley
2000 Washington University St Louis
1999 University of Colorado Boulder