Year	% female
1970	49.74965
1971	49.73474
1972	49.74864
1973	49.78156
1974	49.73184
1975	49.79947
1976	49.83766
1977	49.86383
1978	49.86071
1979	49.93415
1980	49.85278
1981	49.70372
1982	49.99969
1983	50.05106
1984	50.05395
1985	50.02241
1986	50.01708
1987	50.01355
1988	49.98278
1989	49.97715
1990	50.04245
1991	50.08808
1992	50.14292
1993	50.06857
1994	50.05486
1995	50.11086
1996	50.17489
1997	50.15128
1998	50.20175
1999	50.0573
2000	49.91826
2001	49.76784
2002	49.71582
2003	49.70003
2004	50.04152
2005	49.94229
2006	50.01676
2007	50.04388
2008	50.0531
2009	50.09642
2010	50.00283
2011	49.95368
2012	49.97094
2013	49.98252
2014	49.9853
2015	49.94171
2016	49.8829
2017	49.70154
2018	49.69418