Year	% female
1970	47.77068
1971	47.88587
1972	47.99364
1973	48.35171
1974	48.66916
1975	48.72755
1976	48.90538
1977	49.1873
1978	49.28939
1979	49.43993
1980	49.60589
1981	49.72002
1982	49.6691
1983	49.47666
1984	49.49551
1985	49.48696
1986	49.58444
1987	49.60315
1988	49.66055
1989	49.79385
1990	49.73474
1991	49.52413
1992	49.39533
1993	49.44674
1994	49.57861
1995	49.65445
1996	49.66552
1997	49.71611
1998	49.98673
1999	50.07168
2000	50.15847
2001	49.98362
2002	49.92824
2003	49.94842
2004	49.96475
2005	50.07201
2006	50.03121
2007	50.01771
2008	49.96884
2009	49.81624
2010	49.81087
2011	49.70818
2012	49.68095
2013	49.54897
2014	49.52299
2015	49.44692
2016	49.51063
2017	49.50246