Year	% female
1971	10.4766302108765
1972	10.1619396209717
1973	9.10801029205322
1974	10.5387296676636
1975	13.0196695327759
1976	14.9674301147461
1977	16.813009262085
1978	17.5385398864746
1979	20.0745697021484
1980	21.1499996185303
1981	23.6401805877686
1983	27.6562404632568