Year	% female
1970	41.40459
1971	41.34838
1972	41.24039
1973	41.38375
1974	41.38903
1975	41.08778
1976	40.80091
1977	40.62213
1978	40.6413
1979	40.2613
1980	39.93021
1981	40.02603
1982	40.04206
1983	38.65593
1984	37.9278
1985	40.00392
1986	42.16392
1987	42.7963
1988	42.85182
1989	43.01642
1990	43.46566
1991	43.81825
1992	44.14934
1993	44.39611
1994	44.58855
1995	45.22136
1996	45.42471
1997	45.55266
1998	45.51512
1999	45.55408
2000	45.04293
2001	44.82803
2002	44.11954
2003	44.31183
2004	44.13449
2005	44.30382
2006	44.15681
2007	43.8562
2008	44.48951
2009	44.9025
2010	45.29597
2011	45.47309
2012	46.03579
2013	46.36542
2014	46.32892
2015	46.38044
2016	46.57032
2017	46.73604
2018	46.86261