Year	% female
1970	45.0471
1971	44.63167
1972	44.30459
1973	44.06902
1974	44.39728
1975	44.70245
1976	44.14302
1977	44.08544
1978	44.50749
1979	44.92115
1980	44.78755
1981	44.44028
1982	44.55903
1983	44.90824
1984	45.15658
1985	44.81933
1986	45.5085
1987	45.69565
1988	45.80967
1989	46.04895
1990	46.42596
1991	46.69927
1992	47.06956
1993	47.27632
1994	47.56961
1995	47.84056
1996	47.99436
1997	48.21823
1998	48.38157
1999	48.49957
2000	48.60876
2001	48.62939
2002	48.68709
2003	48.64275
2004	48.83179
2005	48.90068
2006	48.97614
2007	49.03882
2008	49.08535
2009	49.15324
2010	49.17417
2011	49.19111
2012	49.19832
2013	49.29591
2014	49.30814
2015	49.04767
2016	49.0559
2017	48.98242
2018	49.00924