Year	% female
1970	33.70304
1971	33.56001
1972	33.51755
1973	33.85968
1974	33.97263
1975	33.6183
1976	33.51567
1977	33.5094
1978	33.72919
1979	33.56334
1980	33.48886
1981	34.24797
1982	35.27293
1983	33.87289
1984	32.9841
1985	35.73521
1986	38.23492
1987	39.13596
1988	39.41312
1989	39.56646
1990	39.60736
1991	39.84775
1992	39.99277
1993	40.01778
1994	39.69409
1995	40.69389
1996	40.82309
1997	40.93976
1998	40.9749
1999	41.22966
2000	40.89145
2001	40.87681
2002	40.75986
2003	41.72597
2004	41.33034
2005	41.87563
2006	41.68448
2007	41.34148
2008	42.04938
2009	42.46789
2010	42.75175
2011	42.95532
2012	43.60058
2013	44.04373
2014	43.87272
2015	44.31603
2016	44.32239
2017	44.47534
2018	44.62379