Year	% female
1970	35.48712
1971	35.56821
1972	35.68258
1973	35.95088
1974	36.24617
1975	36.57719
1976	36.8124
1977	36.76245
1978	36.96269
1979	37.07841
1980	37.1146
1981	37.18629
1982	37.04732
1983	37.98966
1984	37.0949
1985	37.6879
1986	38.37504
1987	38.72383
1988	39.04074
1989	39.36656
1990	39.65153
1991	39.90622
1992	40.21778
1993	40.48176
1994	41.02753
1995	41.29679
1996	41.59071
1997	42.21637
1998	42.87771
1999	43.50803
2000	43.67794
2001	43.87893
2002	44.27191
2003	45.21655
2004	45.07404
2005	45.32588
2006	45.5297
2007	45.76894
2008	46.1342
2009	46.65878
2010	46.71969
2011	46.86365
2012	46.99569
2013	47.51453
2014	47.70174
2015	47.76575
2016	47.86566
2017	47.87217
2018	47.94685