Year	% female
1970	38.15832
1971	38.74196
1972	38.93996
1973	38.82236
1974	38.12824
1975	38.86735
1976	38.70808
1977	37.7848
1978	37.83828
1979	38.14687
1980	38.25159
1981	39.18789
1982	39.64272
1983	39.45613
1984	39.20392
1985	40.27554
1986	40.89069
1987	41.11931
1988	41.59097
1989	42.01015
1990	42.03631
1991	39.91337
1992	39.28357
1993	39.19549
1994	39.53849
1995	40.19441
1996	40.34715
1997	40.03811
1998	40.61958
1999	41.05017
2000	41.028
2001	41.22223
2002	40.84478
2003	40.53837
2004	40.6341
2005	41.0974
2006	41.50124
2007	41.43649
2008	41.04764
2009	40.86513
2010	40.36263
2011	40.51268
2012	40.05148
2013	38.32527
2014	38.72136
2015	39.17698
2016	39.03577
2017	38.46862
2018	38.21064