Year	% female
1970	42.70216
1971	42.6606
1972	42.61771
1973	42.58201
1974	42.53547
1975	43.83108
1976	44.55087
1977	44.68986
1978	44.5741
1979	44.58448
1980	44.59695
1981	44.51588
1982	44.35403
1983	44.36153
1984	44.45216
1985	44.64496
1986	45.14344
1987	45.36113
1988	45.49244
1989	45.46029
1990	45.66373
1991	45.92015
1992	46.10624
1993	46.30702
1994	46.40458
1995	46.49836
1996	46.53878
1997	46.6989
1998	46.73721
1999	46.77836
2000	46.78175
2001	46.84796
2002	46.89032
2003	47.55563
2004	47.51287
2005	47.42307
2006	47.38931
2007	47.34794
2008	47.55103
2009	47.60776
2010	47.62032
2011	47.58599
2012	47.61763
2013	48.30871
2014	48.32287
2015	48.34402
2016	48.76294
2017	48.67083
2018	48.66838