Year	% female
1970	49.38536
1971	49.37862
1972	49.48393
1973	49.62055
1974	49.47255
1975	49.80912
1976	49.8633
1977	49.97498
1978	50.10811
1979	50.30103
1980	50.18206
1981	49.7063
1982	50.40172
1983	50.53373
1984	50.54916
1985	50.55102
1986	50.5583
1987	50.59496
1988	50.5156
1989	50.50701
1990	50.61164
1991	50.64692
1992	50.59554
1993	50.50041
1994	50.52723
1995	50.54632
1996	50.6091
1997	50.44996
1998	50.59295
1999	50.54687
2000	49.91553
2001	49.94666
2002	49.92466
2003	49.9515
2004	50.84969
2005	50.79107
2006	50.7507
2007	50.77015
2008	50.78151
2009	50.70384
2010	50.57773
2011	50.51382
2012	50.45498
2013	50.44895
2014	50.46784
2015	50.45214
2016	50.45942
2017	50.40129
2018	50.40438