1978 — Harvard

1979 — Harvard

1980 — Brown

1981 — Harvard

1982 — Brown, Princeton

1983 — Brown

1984 — Brown

1985 — Brown

1986 — Brown

1987 — Brown, Cornell

1988 — Brown

1989 — Brown

1990 — Brown

1991 — Cornell, Dartmouth

1992 — Brown, Yale

1993 — Dartmouth

1994 — Brown

1995 — Harvard