Year	% female
1970	42.60653
1971	42.59129
1972	42.46704
1973	42.73962
1974	42.56209
1975	43.49772
1976	43.92751
1977	44.14763
1978	44.53416
1979	44.36732
1980	45.1663
1981	47.0499
1982	45.22033
1983	45.83536
1984	45.6688
1985	45.83589
1986	46.12689
1987	46.26914
1988	46.31482
1989	45.75625
1990	45.43111
1991	45.59734
1992	45.77465
1993	45.55167
1994	45.16078
1995	45.19297
1996	45.29608
1997	45.14449
1998	43.9414
1999	44.47021
2000	44.91828
2001	45.03014
2002	45.11717
2003	45.08718
2004	44.25223
2005	44.05137
2006	43.46899
2007	43.41123
2008	43.27657
2009	42.74447
2010	42.85116
2011	42.63287
2012	42.58695
2013	44.04175
2014	43.85629
2015	43.58695
2016	43.67006
2017	43.63798
2018	43.66208