Year	% female
1970	40.63133
1971	40.55214
1972	40.46733
1973	40.64145
1974	40.62244
1975	40.26245
1976	39.98573
1977	39.76631
1978	39.75112
1979	39.38675
1980	39.04579
1981	39.18542
1982	39.39562
1983	37.95779
1984	37.09329
1985	39.20387
1986	41.3866
1987	42.12206
1988	42.28223
1989	42.53382
1990	42.9371
1991	43.25949
1992	43.57624
1993	43.75736
1994	43.81686
1995	44.38055
1996	44.58254
1997	44.69555
1998	44.70001
1999	44.75009
2000	44.29587
2001	44.12813
2002	43.51379
2003	43.71545
2004	43.62007
2005	43.82145
2006	43.76986
2007	43.5034
2008	44.10007
2009	44.4817
2010	44.81407
2011	44.99027
2012	45.55822
2013	45.93708
2014	45.94482
2015	46.08285
2016	46.27311
2017	46.40897
2018	46.5188