Year	% female
1970	52.72192
1971	52.60805
1972	52.91204
1973	53.4545
1974	53.9162
1975	53.65758
1976	53.85952
1977	53.14006
1978	53.06192
1979	52.90172
1980	52.61678
1981	52.67347
1982	51.92238
1983	51.22912
1984	50.86642
1985	50.96172
1986	50.77705
1989	51.05008
1990	51.54405
1991	50.17269
1992	50.64786
1993	51.60197
1998	51.29311
1999	51.22648
2000	50.74295
2002	50.55203
2003	50.63899
2004	50.60238
2005	50.51727
2006	50.56264
2007	50.64234
2008	50.54909
2009	50.52094
2010	50.64445
2011	50.63138
2012	50.8205
2013	50.07645
2014	50.06413
2015	50.03049
2016	50.04602
2017	50.02919