Year	% female
1970	44.21434
1971	44.56072
1972	44.60462
1973	45.48629
1974	46.2678
1975	47.14512
1976	47.93931
1977	48.70845
1978	49.48297
1979	49.59793
1980	49.60002
1981	49.48249
1982	49.71487
1983	49.67404
1984	49.60408
1985	49.54182
1986	49.61617
1987	49.64187
1988	49.57777
1989	49.59375
1990	49.62309
1991	49.75856
1992	49.72856
1993	49.67111
1994	49.61079
1995	49.81253
1996	49.72198
1997	49.81914
1998	50.03494
1999	49.919
2000	49.63494
2001	49.64305
2002	49.40532
2003	49.47584
2004	49.84552
2005	49.82742
2006	49.61072
2007	49.67734
2008	49.60093
2009	49.72223
2010	49.63941
2011	49.54091
2012	49.53486
2013	49.5245
2014	49.54415
2015	49.53922
2016	49.39883
2017	49.36414
2018	49.35635