Year	% female
1970	48.19214
1971	48.79275
1972	49.19214
1973	49.22955
1974	49.62757
1975	50.75561
1976	50.76298
1977	50.08062
1978	50.21939
1979	50.67802
1980	50.61621
1981	50.86498
1982	50.80452
1983	50.8892
1984	50.84153
1985	50.36964
1986	50.94461
1987	50.95105
1988	50.99139
1989	51.04295
1990	51.18528
1991	51.30367
1992	51.20091
1993	51.25295
1994	51.25907
1995	51.25128
1996	51.05508
1997	51.05758
1998	51.05052
1999	51.03116
2000	50.99711
2001	51.01097
2002	51.04246
2003	51.23216
2004	51.13386
2005	51.18803
2006	51.29509
2007	51.31531
2008	51.33837
2009	51.26636
2010	51.13641
2011	51.0351
2012	50.88569
2013	50.6305
2014	50.5025
2015	50.40757
2016	50.2778
2017	50.15431
2018	50.15311