Year	% female
1970	46.96145
1971	46.77766
1972	46.61448
1973	46.82755
1974	47.0596
1975	47.14757
1976	47.53045
1977	47.73295
1978	47.89042
1979	47.97729
1980	48.33641
1981	48.20083
1982	48.03425
1983	47.99082
1984	47.8569
1985	48.09906
1986	48.21477
1987	48.43365
1988	48.64859
1989	48.91035
1990	49.17466
1991	49.35598
1992	49.49856
1993	49.47754
1994	49.68048
1995	49.44856
1996	49.62152
1997	49.47571
1998	49.44268
1999	49.10406
2000	49.06554
2001	49.02193
2002	49.06303
2003	49.04647
2004	48.81058
2005	48.89685
2006	49.22474
2007	49.27988
2008	49.51842
2009	49.65369
2010	49.68902
2011	49.64311
2012	49.64161
2013	49.5858
2014	49.61774
2015	49.6271
2016	49.68293
2017	49.78914
2018	49.76112