Year	% female
1970	60.90027
1971	60.62731
1972	59.30209
1973	59.62044
1974	60.28971
1975	60.71943
1976	61.66274
1977	62.74556
1978	62.95641
1979	63.39271
1980	63.12147
1981	63.55379
1982	62.60866
1983	62.27004
1984	61.93937
1985	61.78838
1986	63.50701
1987	63.50097
1988	63.80304
1998	52.25498
1999	51.08887
2000	50.81943
2001	50.83819
2002	50.79382
2003	50.95283
2004	51.27406
2005	51.52376
2006	51.80645
2007	52.00948
2008	52.17416
2009	51.94837
2010	51.49829
2011	51.6458
2012	51.31096
2013	51.00165
2014	50.7961
2015	50.60901
2016	50.25036
2017	50.17572