Year	% female
1970	49.90336
1971	49.83805
1972	49.79554
1973	50.0593
1974	50.09392
1975	50.7286
1976	50.79545
1977	50.57211
1978	50.56125
1979	50.52439
1980	50.74007
1981	50.58454
1982	50.52807
1983	50.45145
1984	50.26091
1985	50.38906
1986	50.61882
1987	50.46862
1988	50.51682
1989	50.73779
1990	50.74185
1991	50.76457
1992	50.85001
1993	50.79353
1994	50.8028
1995	50.64692
1996	50.79234
1997	50.70211
1998	50.66972
1999	50.44959
2000	50.50147
2001	50.38514
2002	50.38104
2003	50.28401
2004	50.10905
2005	50.22376
2006	50.42235
2007	50.40108
2008	50.51549
2009	50.54862
2010	50.67558
2011	50.52753
2012	50.54315
2013	50.56432
2014	50.60867
2015	50.58537
2016	50.60986
2017	50.65957
2018	50.6009