Year	% female
1970	38.37593
1971	38.48178
1972	38.82997
1973	39.38529
1974	39.36226
1975	39.35958
1976	39.23364
1977	39.29013
1978	39.49256
1979	40.05608
1980	39.23148
1981	39.29784
1982	39.32848
1983	37.12064
1984	35.83548
1985	38.17749
1986	40.79038
1987	41.36567
1988	41.42384
1989	41.34969
1990	41.31937
1991	41.61852
1992	41.67822
1993	42.02733
1994	42.41993
1995	42.79916
1996	43.22357
1997	43.656
1998	43.93479
1999	44.43621
2000	44.19723
2001	44.38589
2002	43.85883
2003	44.68743
2004	44.66313
2005	45.22479
2006	45.11938
2007	44.39492
2008	44.9786
2009	45.60688
2010	45.3747
2011	44.93206
2012	45.22379
2013	45.19234
2014	45.46515
2015	45.59024
2016	45.58855
2017	45.61351
2018	45.96137