Year	% female
1970	39.30691
1971	39.18191
1972	39.57779
1973	39.74302
1974	40.07729
1975	40.32938
1976	40.48901
1977	40.8199
1978	41.08276
1979	41.73789
1980	42.27404
1981	42.74593
1982	43.78191
1983	43.82429
1984	43.86422
1985	43.35305
1986	43.53392
1987	44.2569
1988	44.05357
1989	44.00592
1990	43.93067
1991	44.14125
1992	44.20771
1993	44.11537
1994	44.00003
1995	43.56318
1996	43.52141
1997	43.44951
1998	43.47209
1999	43.99048
2000	44.05607
2001	44.11061
2002	44.0131
2003	44.31641
2004	43.8106
2005	44.67472
2006	44.88857
2007	44.9726
2008	45.29595
2009	45.5464
2010	45.79002
2011	45.92697
2012	46.0996
2013	46.23835
2014	46.31878
2015	46.75802
2016	46.87408
2017	46.88856
2018	46.93447