Year	% female
1973	42.37947
1974	42.27183
1975	44.62092
1976	45.80784
1977	46.02116
1978	45.85308
1979	45.57495
1980	45.52655
1981	45.30905
1982	45.01597
1983	44.99811
1984	45.10663
1985	45.19646
1986	45.83427
1987	46.10463
1988	46.3107
1989	46.55021
1990	46.72099
1991	47.03572
1992	47.26709
1993	47.27212
1994	47.43564
1995	47.51763
1996	47.63072
1997	47.77257
1998	47.75811
1999	47.8394
2000	47.86817
2001	47.89357
2002	47.79705
2003	47.73161
2004	47.61126
2005	47.464
2006	47.37921
2007	47.25874
2008	47.23666
2009	47.13564
2010	47.27971
2011	47.25273
2012	47.11896
2013	47.13927
2014	47.09326
2015	47.00652
2016	47.04672
2017	47.06447
2018	47.09131