Year	% female
1970	49.837
1971	50.32814
1972	50.0995
1973	49.92544
1974	51.15112
1975	50.62665
1976	50.17244
1977	50.828
1978	51.21977
1979	50.99142
1980	51.37092
1981	51.61226
1982	51.47017
1983	51.3713
1984	51.23683
1985	51.15044
1986	51.10755
1987	50.99794
1988	50.97035
1989	50.67436
1990	50.7402
1999	50.38415
2000	51.62137
2001	50.47822
2002	51.62296
2004	51.54063
2005	51.90545
2006	51.36306
2007	51.41868
2008	51.41369
2009	51.52935
2010	50.9983
2011	51.26323
2016	50.41576
2017	51.15008