Year	% female
1970	42.03917
1971	42.02518
1972	42.05968
1973	42.04449
1974	42.01474
1975	43.17608
1976	43.824
1977	44.0331
1978	44.02408
1979	44.04295
1980	44.10238
1981	44.11446
1982	44.04301
1983	43.95292
1984	44.10267
1985	44.26922
1986	44.71365
1987	44.90897
1988	45.01548
1989	45.06974
1990	45.21401
1991	45.47319
1992	45.66006
1993	45.82492
1994	45.93158
1995	45.98974
1996	46.04857
1997	46.1843
1998	46.21845
1999	46.30483
2000	46.34561
2001	46.43293
2002	46.44814
2003	47.01755
2004	46.97941
2005	47.04443
2006	47.12565
2007	47.19094
2008	47.38291
2009	47.4806
2010	47.54687
2011	47.58328
2012	47.68228
2013	48.16702
2014	48.17512
2015	48.22386
2016	48.4765
2017	48.42362
2018	48.39303