Year	% female
1970	54.10605
1971	53.76623
1972	53.02307
1973	53.82956
1974	53.92217
1975	54.86291
1976	56.2253
1977	54.96111
1978	54.6205
1979	53.64051
1980	53.41358
1981	51.47899
1982	50.48306
1983	49.88802
1984	48.60766
1985	49.26316
1986	48.33122
1987	48.14663
1988	48.68016
1989	49.2383
1991	49.18869
1992	49.41755
1993	49.90238
1994	50.29834
1995	49.61032
1996	49.63808
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	49.38781
2013	51.66222
2014	51.06596
2015	51.76917
2016	52.61842
2017	53.10219
2018	51.02428