Year	% female
1970	42.0387
1971	42.16679
1972	42.17234
1973	42.44701
1974	42.83877
1975	43.23618
1976	43.39232
1977	43.56202
1978	43.9688
1979	44.16658
1980	44.09702
1981	43.96556
1982	43.88296
1983	44.16835
1984	43.89552
1985	43.72156
1986	44.19882
1987	44.42382
1988	44.49026
1989	44.62324
1990	44.65405
1991	44.796
1992	44.94851
1993	45.04479
1994	45.36358
1995	45.60105
1996	45.74962
1997	45.95535
1998	46.31247
1999	46.57634
2000	46.62152
2001	46.67399
2002	46.74654
2003	47.06287
2004	47.07361
2005	47.22272
2006	47.2656
2007	47.3611
2008	47.4763
2009	47.70206
2010	47.54244
2011	47.58279
2012	47.64525
2013	47.91619
2014	47.99342
2015	47.96893
2016	47.99251
2017	47.94622
2018	47.9647