Year	% female
1973	42.99094
1974	42.85535
1975	44.9726
1976	46.04856
1977	46.2455
1978	46.0955
1979	45.84655
1980	45.80654
1981	45.60819
1982	45.34361
1983	45.3272
1984	45.42272
1985	45.49811
1986	46.07524
1987	46.31776
1988	46.50514
1989	46.72418
1990	46.88128
1991	47.16842
1992	47.37909
1993	47.37858
1994	47.52319
1995	47.59365
1996	47.69239
1997	47.81415
1998	47.79593
1999	47.86784
2000	47.88966
2001	47.91212
2002	47.82385
2003	47.76608
2004	47.65468
2005	47.52241
2006	47.45022
2007	47.34208
2008	47.32405
2009	47.23121
2010	47.36416
2011	47.33989
2012	47.21518
2013	47.23523
2014	47.19592
2015	47.11611
2016	47.15401
2017	47.17031
2018	47.19927