Year	% female
1970	34.00445
1971	33.96415
1972	34.27246
1973	34.61361
1974	35.0347
1975	35.05841
1976	35.69229
1977	36.30751
1978	36.62959
1979	37.08884
1980	37.39585
1981	37.91165
1982	38.41664
1983	38.93881
1984	39.32113
1985	39.71964
1986	40.05073
1987	40.39797
1988	40.81132
1989	41.1666
1990	41.8984
1991	42.39865
1992	43.05439
1993	43.39622
1994	43.5398
1995	44.11128
1996	44.26898
1997	44.61307
1998	45.14536
1999	45.66162
2000	45.94304
2001	46.10844
2002	46.44848
2003	46.71534
2004	46.76579
2005	47.04916
2006	47.22165
2007	47.30593
2008	47.25407
2009	47.17352
2010	47.1564
2011	47.23675
2012	47.14769
2013	47.09734
2014	46.95668
2015	47.07118
2016	47.06386
2017	47.10866
2018	47.202