Year	% female
1971	22.38786
1972	24.74041
1973	23.65124
1974	23.76551
1975	23.22008
1976	23.80287
1977	22.86957
1978	23.08333
1979	23.83804
1980	24.1794
1982	25.35707
1983	25.02309
1984	24.59481
1985	24.03105
1986	23.70778
1987	23.57194
1988	24.61738
1989	23.8719
1990	25.50977
1991	25.30248
1992	24.69432
1994	25.56276
1995	26.14185
1996	26.11266
1997	26.70066
1999	28.61978
2000	30.89683
2001	31.4347
2002	32.31088
2003	33.00269
2004	34.01628
2005	34.68935
2006	35.31219
2007	34.59351
2017	41.95472