Year	% female
1971	50.24296
1972	50.87384
1973	51.35055
1974	52.28687
1975	52.63543
1976	53.27893
1977	53.3353
1978	53.51706
1979	53.66744
1980	53.73979
1981	53.74695
1982	53.46809
1983	53.64186
1984	52.86081
1985	52.87226
1986	52.884
1987	53.00443
1988	52.69317
1989	52.20235
1990	51.71312
1991	51.57993
1992	51.57368
1993	51.69877
1994	51.55494
1995	51.35658
1996	51.81384
1997	51.82165
1999	51.91447
2000	51.86978
2001	51.59482
2002	51.30327
2003	51.19805
2004	51.41853
2005	51.4712
2006	51.49147
2007	51.62492
2008	51.44466
2009	51.34406
2010	51.47747
2011	51.37782
2012	51.59634
2013	51.17573
2014	51.38194
2015	51.28059
2016	51.20718
2017	51.18665