Year	% female
1973	52.69066
1974	52.42501
1975	53.91764
1976	53.65555
1977	52.4555
1979	52.11445
1980	52.33771
1981	52.39108
1983	52.0478
1984	51.66325
1985	51.61116
1986	52.44495
1990	51.59253
1991	51.60338
1999	50.23989
2000	50.54422
2001	50.52178
2002	50.41328
2003	50.10531
2004	49.87354
2005	50.0613
2009	49.57911
2010	50.839
2011	50.84836
2013	50.65761
2014	50.73687
2015	50.56599
2016	50.06342
2017	50.20531
2018	49.71555