Year	% female
1970	36.21463
1971	36.26335
1972	36.29364
1973	36.15734
1974	36.12435
1975	36.09748
1976	35.65726
1977	34.88004
1978	34.51517
1979	34.25856
1980	34.28846
1981	34.48104
1982	35.88098
1983	34.44213
1984	32.81446
1985	35.00388
1986	36.19148
1987	37.49191
1988	38.15978
1989	38.6987
1990	38.74762
1991	38.44463
1992	38.27342
1993	37.97918
1994	37.12715
1995	36.60349
1996	36.68295
1997	36.12635
1998	36.74973
1999	37.05746
2000	37.2281
2001	37.28301
2002	37.1675
2003	37.38393
2004	38.23199
2005	39.54796
2006	40.41399
2007	40.42655
2008	40.52911
2009	41.17592
2010	40.55739
2011	41.43484
2012	41.82416
2013	41.81218
2014	41.71472
2015	41.23487
2016	40.99596
2017	40.7461
2018	39.71532