Year	% female
1970	40.62487
1971	40.54512
1972	40.46083
1973	40.6342
1974	40.61497
1975	40.25372
1976	39.97885
1977	39.75875
1978	39.74327
1979	39.37884
1980	39.03775
1981	39.17721
1982	39.38676
1983	37.9495
1984	37.08531
1985	39.19795
1986	41.38244
1987	42.11901
1988	42.27912
1989	42.53052
1990	42.93394
1991	43.25651
1992	43.57318
1993	43.75432
1994	43.81388
1995	44.37843
1996	44.58038
1997	44.69371
1998	44.69845
1999	44.74785
2000	44.29344
2001	44.1262
2002	43.51176
2003	43.71353
2004	43.61818
2005	43.8198
2006	43.76847
2007	43.50187
2008	44.09875
2009	44.48064
2010	44.81332
2011	44.98964
2012	45.55783
2013	45.93645
2014	45.9443
2015	46.08228
2016	46.27246
2017	46.40833
2018	46.51831