2010 Philadelphia, PA

2009 Chicago, IL

2008 Atlanta, GA

2007 Boston, MA

2006 San Francisco, CA

2005 Chicago, IL

2004 San Diego, CA

2003 New York, NY

2002 Washington, D.C.

2001 Chicago, IL

2000 San Diego, CA

1999 Boston, MA

1998 Washington, D.C.

1997 Chicago, IL

1996 Honolulu, HI

1995 Washington, D.C.

1994 Boston, MA

1993 Los Angeles, CA

1992 Washington, D.C.

1991 New Orleans, LA

1990 Chicago, IL

1989 Washington, D.C.

1988 San Francisco, CA

1987 Boston, MA

1986 Chicago, IL

1985 Philadelphia, PA

1984 Washington, D.C.

1983 San Francisco, CA

1982 Chicago, IL

1981 Toronto, Canada

1980 Washington, D.C.

1979 Los Angeles, CA

1978 Chicago, IL

1977 New York, NY

1976 Toronto, Canada

1975 San Francisco, CA

1974 Boston, MA

1973 Chicago, IL

1972 New York, NY

1971 Washington, D.C.

1970 San Francisco, CA

1969 Boston, MA

1968 Philadelphia, PA

1967 Chicago, IL

1966 New York, NY

1965 San Francisco, CA

1964 Washington, D.C.

1963 Philadelphia, PA

1962 Boston, MA

1961 Chicago, IL

1960 New York, NY

1959 Washington, D.C.

1958 New York, NY

1957 Boston, MA

1956 Philadelphia, PA

1955 Washington, D.C.

1954 New York, NY

1953 Cleveland, OH

1952 Boston, MA

1951 Philadelphia

1950 Ann Arbor, MI

1949 New Haven, CT