Year	% female
1971	40.79256
1972	44.46369
1973	45.27654
1974	46.68489
1975	46.91823
1976	47.52108
1977	47.64243
1978	47.8101
1979	46.64595
1980	46.31701
1981	45.58203
1982	45.83769
1983	45.77597
1984	47.08448
1985	47.46386
1986	48.12971
1987	48.0789
1988	48.43858
1989	49.30308
1990	49.65456
1991	50.10105
1992	50.34362
1993	50.09221
1994	49.95664
1995	49.69406
1996	50.15204
1997	50.73797
1998	50.7336
1999	50.97334
2000	50.63874
2001	50.95547
2002	50.70066
2003	50.19655
2004	49.89086
2005	49.9672
2006	49.67804
2008	49.5406
2009	49.58819
2010	49.61398
2011	49.28595
2012	49.08529
2013	48.73067
2014	48.93997
2015	48.87295
2016	48.88571
2017	48.95992
2018	48.80536