Year	% female
1970	55.44722
1971	55.49199
1972	53.58737
1973	54.7046
1974	53.41451
1975	56.24669
1976	55.47066
1978	54.02423
1979	53.37352
1980	52.95853
1981	52.77108
1982	53.02932
1983	51.20868
1985	49.32487
1986	48.42629
1987	47.40571
1988	47.75598
1989	48.36883
1991	48.83592
1992	49.33566
1993	49.72012
1994	49.79526
1995	48.99787
1996	49.42301
1998	48.97222
1999	50.89576
2000	51.31643
2001	50.74528
2002	50.61334
2003	50.59604
2004	51.10525
2005	50.29996
2006	50.05132
2007	50.4072
2008	50.7774
2009	50.32588
2010	49.444
2011	49.31815
2012	48.18766
2013	50.74099
2014	49.9519
2015	50.63565
2016	51.5425
2017	51.77941
2018	50.63681