Year	% female
1970	46.82641
1971	44.15073
1972	44.16193
1973	44.10469
1974	44.6243
1975	45.31528
1976	46.01826
1977	45.73514
1978	46.22829
1979	46.39806
1980	47.10509
1983	50.27829
1984	51.22147
1988	52.67625
1989	50.74394
1991	52.84566
1992	51.74102
1993	51.50673
1998	49.14443
1999	48.79113
2000	49.18175
2001	49.51202
2002	49.55736
2003	49.87237
2004	49.88392
2005	49.99103
2006	50.31877
2007	50.31314
2008	50.07538
2009	49.75101
2010	49.55165
2011	49.31878
2012	49.32373
2013	49.5877
2014	49.7509
2015	49.71839
2016	49.49582
2017	49.34364
2018	49.35867