Year	% female
1970	74.93473
1971	75.54535
1972	86.1629
1973	85.28265
1974	74.79748
1975	81.40244
1976	84.8257
1977	85.45067
1978	100
1979	100
1980	100
1981	100
1982	100
1983	100
1984	100
1985	100
1986	100