Year	% female
1971	14.12905
1972	14.98072
1973	14.74314
1974	14.13157
1975	13.43603
1976	13.0944
1977	14.35208
1978	17.17577
1979	20.95906
1980	18.66198
1981	19.86856
1982	24.61095
1983	25.37011
1984	30.14222
1985	29.85533
1986	29.01339
1987	29.35654
1988	29.64228
1989	30.18773
1990	31.97005
1991	32.71088
1992	34.91157
1993	37.1875
1994	34.33647
1995	35.32918
1996	39.41297
1997	39.67643
1998	40.30188
1999	38.38914
2000	43.16054
2001	43.54905
2002	42.24175
2003	41.32842
2004	39.46355
2005	37.8588
2006	36.79203
2007	35.19733
2010	35.14919
2011	36.7283
2012	37.82506
2013	38.8342
2014	34.62938
2015	31.53002
2016	32.89778
2017	34.44719