Year	% female
1970	40.73284
1971	40.76317
1972	40.76599
1973	40.81091
1974	41.10663
1975	41.38938
1976	41.27193
1977	41.42308
1978	41.84622
1979	42.16952
1980	41.92097
1981	41.60817
1982	41.45897
1983	41.89216
1984	41.5716
1985	41.42128
1986	42.24528
1987	42.50041
1988	42.68693
1989	42.9236
1990	43.17301
1991	43.42535
1992	43.73763
1993	43.93608
1994	44.28867
1995	44.59015
1996	44.8243
1997	45.24587
1998	45.64864
1999	46.02793
2000	46.16556
2001	46.25728
2002	46.46714
2003	46.86585
2004	46.84675
2005	46.96604
2006	47.04228
2007	47.1632
2008	47.35239
2009	47.65214
2010	47.71847
2011	47.8164
2012	47.91089
2013	48.30097
2014	48.38155
2015	48.31476
2016	48.38164
2017	48.41465
2018	48.48469