Year	% female
1970	40.97821
1971	40.98988
1972	41.024
1973	41.08184
1974	41.35166
1975	41.57818
1976	41.5674
1977	41.67509
1978	42.1104
1979	42.54146
1980	42.2926
1981	42.00011
1982	41.88554
1983	42.31869
1984	41.99111
1985	41.72704
1986	42.5233
1987	42.87577
1988	43.04268
1989	43.28092
1990	43.37377
1991	43.57046
1992	43.80589
1993	43.98307
1994	44.50655
1995	44.77249
1996	45.02487
1997	45.34804
1998	45.79559
1999	46.19082
2000	46.31033
2001	46.40641
2002	46.56726
2003	46.96864
2004	46.99417
2005	47.19528
2006	47.32267
2007	47.42522
2008	47.59166
2009	47.87247
2010	47.65458
2011	47.69873
2012	47.7582
2013	48.0631
2014	48.15605
2015	48.11105
2016	48.15527
2017	48.09595
2018	48.11523