Year	% female
1970	44.89049
1971	44.53905
1972	44.29943
1973	44.09824
1974	44.38695
1975	44.54076
1976	44.20343
1977	44.13582
1978	44.56547
1979	45.0817
1980	44.93238
1981	44.62422
1982	44.79618
1983	45.1604
1984	45.3272
1985	44.81377
1986	45.40234
1987	45.75853
1988	45.83618
1989	46.06148
1990	46.1525
1991	46.40812
1992	46.66881
1993	46.85124
1994	47.41153
1995	47.65371
1996	47.82412
1997	47.91233
1998	48.11062
1999	48.2653
2000	48.36461
2001	48.36663
2002	48.37075
2003	48.38766
2004	48.57259
2005	48.77621
2006	48.87811
2007	48.92231
2008	48.9568
2009	49.02708
2010	48.59129
2011	48.57703
2012	48.6042
2013	48.67782
2014	48.69495
2015	48.53337
2016	48.51954
2017	48.37876
2018	48.33152