Year	% female
1971	8.50714015960693
1972	12.464940071106
1973	16.8747501373291
1974	16.1449203491211
1975	17.3700294494629
1976	19.6790294647217
1977	17.4064693450928
1978	19.9099807739258
1979	14.2778196334839
1980	16.1667499542236
1981	16.5149898529053
1982	16.3360691070557
1983	18.3519496917725
1984	18.6872901916504
1985	23.3264503479004
1986	23.6901798248291
1987	24.2681694030762
1988	25.1423091888428
1989	24.9909706115723
1999	30.7496604919434
2000	30.4690093994141
2004	35.1025695800781
2005	35.1047782897949