Year	% female
1971	42.07483
1972	42.32216
1973	42.38224
1974	42.38892
1975	42.31679
1976	41.76369
1977	40.61835
1978	39.32949
1979	39.23223
1980	39.24423
1981	39.8654
1982	39.32931
1983	38.55111
1984	37.2505
1985	36.66692
1986	37.32643
1987	37.66329
1988	37.81047
1989	38.27071
1990	38.49991
1991	39.1628
1992	38.41467
1993	37.5941
1994	37.65759
1995	37.54596
1996	37.42858
1997	37.82882
1998	37.19563
1999	37.09804
2000	37.29112
2001	38.30231
2002	38.92712
2003	38.78915
2004	38.24623
2005	38.07662
2006	38.17397
2007	38.14997
2008	38.67533
2009	38.91626
2010	39.13367
2011	38.78165
2012	39.12009
2013	40.20622
2014	41.53608
2015	41.36026
2016	41.16416
2017	41.41524