Year	% female
1970	45.6
1971	45
1972	45.1
1973	44.65686
1974	44.08009
1975	45.49947
1976	46.21545
1977	46.21673
1978	46.20685
1981	46.15445
1982	46.81442
1983	47.98625
1984	48.08851
1985	48.16486
1986	47.90072
1987	48.09234
1988	48.00035
1989	48.2967
1990	48.30095
1991	48.66408
1992	48.89424
1993	48.49541
1994	48.41517
1995	48.32803
1996	48.33018
1997	48.33018
1998	47.78907
1999	48.49304
2000	48.50018
2001	48.62186
2002	48.62113
2003	48.67859
2004	48.72238
2005	48.26
2006	48.23694
2007	48.0562
2008	48.44783
2009	48.26759
2010	49.52885
2011	49.51251
2012	48.49679
2013	48.45504
2014	47.90869
2015	47.8247
2016	47.76931
2017	47.77523
2018	47.77049