Year	% female
1970	42.77221
1971	42.82125
1972	43.20827
1973	43.63952
1974	43.60552
1975	44.20366
1976	44.55415
1977	44.50026
1978	44.74801
1979	44.65372
1980	45.47769
1981	47.24183
1982	45.69796
1983	46.2963
1984	46.2281
1985	46.27074
1986	46.72576
1987	46.9323
1988	46.86751
1989	46.56259
1990	46.28439
1991	46.313
1992	46.09987
1993	46.12355
1994	45.89317
1995	45.80923
1996	46.01514
1997	45.98775
1998	45.02702
1999	44.97481
2000	45.36407
2001	45.29321
2002	45.15975
2003	45.3045
2004	44.52903
2005	44.79598
2006	44.40236
2007	44.40132
2008	44.53847
2009	44.29274
2010	44.36497
2011	44.23171
2012	44.49399
2013	45.51869
2014	45.46813
2015	45.59731
2016	45.8045
2017	45.51386
2018	45.54381