Year	% female
1970	41.05119
1971	41.05779
1972	41.08907
1973	41.12624
1974	41.37704
1975	41.56102
1976	41.5341
1977	41.60792
1978	41.99957
1979	42.39226
1980	42.13709
1981	41.8732
1982	41.77248
1983	42.18703
1984	41.88122
1985	41.63164
1986	42.41042
1987	42.75928
1988	42.93117
1989	43.16692
1990	43.26719
1991	43.46002
1992	43.69579
1993	43.86114
1994	44.33778
1995	44.62876
1996	44.86957
1997	45.16711
1998	45.58735
1999	45.95569
2000	46.06403
2001	46.13717
2002	46.28926
2003	46.67115
2004	46.68028
2005	46.8725
2006	46.97569
2007	47.08526
2008	47.25017
2009	47.51745
2010	47.34625
2011	47.41568
2012	47.49408
2013	47.79386
2014	47.88779
2015	47.86408
2016	47.91316
2017	47.86446
2018	47.88854