Year	% female
1977	49.05566
1978	49.32353
1979	49.36521
1980	49.39281
1981	49.43854
1982	49.6136
1983	49.62286
1984	49.66969
1985	49.74409
1986	49.64439
1987	49.62931
1988	49.6354
1989	49.78322
1990	49.82811
1991	49.88194
1992	50.03273
1993	50.38378
1994	50.48917
1995	50.68403
1996	50.79323
1998	50.25132
1999	50.30619
2000	50.69249
2001	50.63005
2002	50.6209
2003	50.60044
2004	50.6328
2005	50.71416
2006	50.81584
2007	50.93756
2008	50.99458
2009	51.05245
2010	50.96703
2011	50.92208
2012	50.93294
2013	51.53089
2015	51.3008
2016	51.31024
2017	51.20901