Year	% female
1970	49.77168
1971	50.53616
1972	52.42581
1973	52.5396
1974	52.42159
1975	48.55481
1976	52.34396
1977	52.07496
1978	53.28686
1979	54.18573
1980	54.06118
1981	54.62783
1982	54.23465
1983	54.75259
1984	53.98177
1985	53.33676
1986	53.82792
1987	53.5634
1988	53.5252
1989	53.62696
1990	54.03581
1991	54.53446
1992	53.4571
1993	53.77995
1994	53.991
1995	53.87658
1996	53.51969
1997	53.77887
1998	53.62577
1999	53.8318
2000	52.78045
2001	52.43032
2002	52.17255
2003	55.07417
2004	51.80875
2005	51.89709
2006	52.42837
2007	52.9704
2008	53.02006
2009	53.24684
2010	53.24028
2011	53.14821
2012	53.09733
2013	51.75584
2014	51.72859
2015	52.05091
2016	52.19671
2017	51.77369
2018	51.78889