Year	% female
1973	52.49254
1974	52.30964
1975	53.81501
1976	53.54223
1977	52.42823
1979	52.54068
1980	53.0155
1981	53.12277
1983	51.97389
1984	51.5928
1985	51.52499
1986	52.36861
1987	51.15169
1988	51.37031
1989	52.18963
1991	51.60471
1993	51.32066
1999	50.25543
2000	50.55997
2001	50.53469
2002	50.40295
2003	50.09208
2004	49.87354
2005	50.0613
2007	50.35266
2008	50.40555
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