Year	% female
1973	45.05839
1974	45.43418
1975	45.45042
1976	44.78801
1977	44.67668
1978	45.06989
1979	45.47727
1980	45.36719
1981	44.89468
1982	44.96097
1983	45.27925
1984	45.45682
1985	45.08687
1986	45.73531
1987	45.90564
1988	46.00511
1989	46.23075
1990	46.60722
1991	46.83583
1992	47.22842
1993	47.42211
1994	47.73297
1995	47.95842
1996	48.04969
1997	48.20864
1998	48.36655
1999	48.47637
2000	48.54823
2001	48.57178
2002	48.5823
2003	48.51465
2004	48.62869
2005	48.66857
2006	48.69867
2007	48.69597
2008	48.77569
2009	48.85816
2010	48.88907
2011	48.90149
2012	48.9147
2013	48.98864
2014	48.9897
2015	48.79372
2016	48.73018
2017	48.65182
2018	48.69647