Year	% female
1972	29.79516
1973	26.97023
1975	20.88959
1976	5.23605
1977	21.19253
1978	15.85302
1979	17.18016
1980	17.64706
1981	24.32
1982	25.21186
1983	25.57883
1984	27.8436
1985	26.72259
1986	27.11771
1987	20.43011
1988	25.66955
1989	27.46976
1990	23.25368
1991	27.92453
1993	34.40684
1994	31.09005
1995	20.39841
1996	20.67327