Year	% female
1973	42.32653
1974	42.2166
1975	44.58387
1976	45.78015
1977	45.99426
1978	45.82362
1979	45.54292
1980	45.49513
1981	45.27681
1982	44.9818
1983	44.96515
1984	45.0766
1985	45.16981
1986	45.81399
1987	46.0873
1988	46.29474
1989	46.53506
1990	46.70589
1991	47.02211
1992	47.25484
1993	47.25974
1994	47.42477
1995	47.50774
1996	47.62198
1997	47.76507
1998	47.75064
1999	47.83245
2000	47.86125
2001	47.88649
2002	47.78859
2003	47.722
2004	47.60116
2005	47.45236
2006	47.36664
2007	47.24516
2008	47.22288
2009	47.12091
2010	47.26592
2011	47.23846
2012	47.10341
2013	47.12378
2014	47.07714
2015	46.98998
2016	47.03053
2017	47.04842
2018	47.07546