2012 St. Louis 2011 Atlanta 2010 Philadelphia 2009 Dallas 2008 Ottawa 2007 Tempe 2006 Baltimore 2005 Cincinnati 2004 Austin 2003 Washington, D.C. 2002 San Diego 2001 Chicago 2000 Princeton 1999 Toronto 1998 Seattle 1997 Minneapolis  1996 Richmond 1995 Houston  1994 Washington 1993 Memphis

1992 New Haven 1991 San Francisco 1990 Chicago 1989 Atlanta 1988 Charleston 1987 Philadelphia 1986 Toronto  1985 New Orleans 1984 Newark, NJ  1983 Baltimore 1982 St. Louis 1981 Washington 1980 Philadelphia  1979 Williamsburg  1978 Chicago 1977 Boston 1976 Philadelphia 1975 Atlanta 1974 Washington, D.C. 1973 Chicago