Year	% female
1971	42.4957
1972	42.27147
1973	42.09744
1974	42.25665
1975	42.3008
1976	42.10627
1977	42.45755
1978	43.2384
1979	43.21103
1980	42.99212
1981	42.42055
1982	42.4044
1983	42.84967
1984	43.08015
1985	43.36892
1986	43.2824
1987	43.8644
1988	43.89952
1989	44.15448
1990	44.19134
1991	44.33624
1992	44.74941
1993	44.95546
1994	45.78639
1995	46.16788
1996	46.4805
1997	46.53684
1998	46.97865
1999	47.31983
2000	47.45235
2001	47.50079
2002	47.5499
2003	47.59295
2004	47.81393
2005	48.00446
2006	48.14349
2007	48.17866
2008	48.21818
2009	48.31273
2010	47.82453
2011	47.83729
2012	47.93775
2013	47.84198
2014	47.951
2015	47.90091
2016	47.93998
2017	47.90316
2018	47.87706