Year	% female
1970	35.59416
1971	35.38426
1972	35.267
1973	35.54645
1974	35.88601
1975	35.86227
1976	35.98682
1977	36.03348
1978	35.9495
1979	35.94467
1980	36.08062
1981	36.63838
1982	37.61972
1983	38.15293
1984	38.41118
1985	38.72692
1986	39.11027
1987	39.59414
1988	40.02708
1989	40.30591
1990	40.51264
1991	40.52821
1992	40.69541
1993	40.63387
1994	40.11549
1995	41.51428
1996	41.43128
1997	41.52743
1998	41.34943
1999	41.25457
2000	41.54329
2001	40.90474
2002	41.62662
2003	42.27351
2004	41.9075
2005	42.52578
2006	42.52035
2007	42.80198
2008	42.88637
2009	42.93895
2010	43.27666
2011	43.61266
2012	43.75596
2013	43.89737
2014	43.75231
2015	44.23802
2016	44.53234
2017	44.64073
2018	44.68066