1955 — Harvard, Pennsylvania
1956 — Yale
1957 — Princeton
1958 — Harvard
1959 — Harvard
1960 — Princeton
1961 — Harvard
1962 — Harvard
1963 — Brown, Harvard
1964 — Brown, Dartmouth
1965 — Brown
1966 — Brown
1967 — Brown
1968 — Brown
1969 — Harvard
1970 — Harvard
1971 — Pennsylvania
1972 — Pennsylvania
1973 — Brown
1974 — Brown
1975 — Brown, Cornell
1976 — Brown
1977 — Cornell
1978 — Columbia
1979 — Columbia
1980 — Columbia, Pennsylvania
1981 — Columbia
1982 — Columbia
1983 — Columbia
1984 — Columbia
1985 — Columbia
1986 — Yale
1987 — Harvard
1988 — Dartmouth, Princeton
1989 — Yale
1990 — Dartmouth
1991 — Yale
1992 — Dartmouth
1993 — Columbia, Princeton
1994 — Harvard, Brown
1995 — Cornell, Brown