Year	% female
1970	42.35133
1971	42.6825
1972	42.39129
1973	42.20457
1974	42.40183
1975	42.43706
1976	42.23411
1977	42.5904
1978	43.39292
1979	43.36465
1980	43.15282
1981	42.55234
1982	42.46233
1983	42.89666
1984	43.09454
1985	43.43237
1986	43.54067
1987	43.80344
1988	43.87233
1989	44.11612
1990	44.52711
1991	44.76247
1992	45.21571
1993	45.41959
1994	45.89985
1995	46.2047
1996	46.44425
1997	46.66637
1998	47.06852
1999	47.33861
2000	47.49759
2001	47.54714
2002	47.65367
2003	47.69959
2004	47.82675
2005	47.91859
2006	48.04008
2007	48.13655
2008	48.22345
2009	48.37491
2010	48.50801
2011	48.56514
2012	48.71294
2013	48.72873
2014	48.82801
2015	48.62007
2016	48.76338
2017	48.80488
2018	48.87815