Year	% female
1970	36.54289
1971	36.50568
1972	36.83311
1973	37.18786
1974	37.43216
1975	37.91219
1976	38.388
1977	38.91544
1978	39.39726
1979	40.35313
1980	40.84555
1981	41.31461
1982	41.63601
1983	41.96696
1984	42.42155
1985	42.84746
1986	43.26494
1987	43.57139
1988	43.66045
1989	44.13388
1990	44.46405
1991	44.6024
1992	44.96752
1993	45.14281
1994	45.17352
1995	45.39602
1996	44.59004
1997	45.37732
1998	45.54603
1999	45.75798
2000	45.96417
2001	46.1922
2002	46.38304
2003	46.50949
2004	46.59021
2005	46.59977
2006	46.669
2007	46.81903
2008	46.93704
2009	46.99936
2010	47.04634
2011	46.92314
2012	47.21358
2013	47.49158
2014	47.6926
2015	47.76535
2016	47.84623
2017	47.80798
2018	47.83834