Year	% female
1970	42.10998
1971	42.09364
1972	42.12146
1973	42.10093
1974	42.06183
1975	43.20799
1976	43.84907
1977	44.05537
1978	44.04834
1979	44.06519
1980	44.12498
1981	44.138
1982	44.06661
1983	43.98003
1984	44.13042
1985	44.29998
1986	44.74266
1987	44.93878
1988	45.04541
1989	45.09894
1990	45.24112
1991	45.49736
1992	45.6797
1993	45.84396
1994	45.94895
1995	46.0062
1996	46.06495
1997	46.19775
1998	46.23076
1999	46.31665
2000	46.35762
2001	46.44423
2002	46.45913
2003	47.02521
2004	46.98545
2005	47.04979
2006	47.12993
2007	47.19422
2008	47.3846
2009	47.48173
2010	47.54916
2011	47.58537
2012	47.68455
2013	48.16726
2014	48.17655
2015	48.22523
2016	48.477
2017	48.42442
2018	48.39372