Year	% female
1970	48.29491
1971	48.84874
1972	49.22396
1973	49.24721
1974	49.61728
1975	50.69682
1976	50.71599
1977	50.08943
1978	50.24653
1979	50.68716
1980	50.61221
1981	50.84207
1982	50.79001
1983	50.88554
1984	50.81813
1985	50.36912
1986	50.92895
1987	50.93365
1988	50.98273
1989	51.0469
1990	51.18983
1991	51.31333
1992	51.21788
1993	51.25581
1994	51.25308
1995	51.24869
1996	51.03503
1997	51.05962
1998	51.04312
1999	51.01436
2000	50.97543
2001	50.98963
2002	50.99769
2003	51.17597
2004	51.0941
2005	51.14648
2006	51.25271
2007	51.2679
2008	51.29038
2009	51.22126
2010	51.09589
2011	50.99436
2012	50.85658
2013	50.60179
2014	50.47885
2015	50.38875
2016	50.26348
2017	50.13873
2018	50.13663