Year	% female
1971	49.68732
1976	52.33246
1977	52.55825
1978	51.36175
1979	50.41209
1980	44.99003
1981	44.55554
1982	44.98011
1983	44.20292
1984	43.89015
1985	44.21639
1986	44.49889
1987	44.6559
1988	44.88046
1989	45.33792
1990	45.44758
1991	45.61128
1992	45.34987
1999	50.79303
2000	49.10816
2001	50.22421
2002	50.12557
2003	47.48511
2004	47.65931
2005	47.21235
2006	47.8135
2007	47.63393
2008	47.84645
2009	49.09586
2010	50.67378
2011	51.53482
2012	52.21671
2013	52.12076
2014	52.49162
2015	52.22141
2016	52.53965
2017	53.10014
2018	53.156