Year	% female
1970	40.89874
1971	40.91479
1972	40.92479
1973	40.96354
1974	41.25562
1975	41.52278
1976	41.37814
1977	41.5013
1978	41.90758
1979	42.21693
1980	41.95767
1981	41.63461
1982	41.47568
1983	41.90914
1984	41.58632
1985	41.4407
1986	42.27233
1987	42.53676
1988	42.73198
1989	42.97395
1990	43.23032
1991	43.48944
1992	43.80805
1993	44.00667
1994	44.36144
1995	44.66009
1996	44.89006
1997	45.30028
1998	45.70488
1999	46.07915
2000	46.21218
2001	46.30028
2002	46.50103
2003	46.89789
2004	46.87993
2005	46.99899
2006	47.07402
2007	47.19076
2008	47.38085
2009	47.67869
2010	47.74297
2011	47.83782
2012	47.93078
2013	48.31674
2014	48.39518
2015	48.32657
2016	48.39233
2017	48.42643
2018	48.49572