Year	% female
1970	43.99388
1971	44.28464
1972	44.33709
1973	45.10413
1974	45.73615
1975	46.57653
1976	47.26894
1977	47.93992
1978	48.62135
1979	48.66942
1980	48.82591
1981	49.02358
1982	48.91427
1983	48.98942
1984	48.94097
1985	48.91181
1986	49.03282
1987	49.095
1988	49.02379
1989	48.94963
1990	48.92127
1991	49.0417
1992	49.05673
1993	48.9674
1994	48.8039
1995	48.97902
1996	48.94214
1997	49.02883
1998	49.16454
1999	49.06792
2000	48.93193
2001	48.93869
2002	48.74521
2003	48.8042
2004	48.91681
2005	48.86088
2006	48.64787
2007	48.69442
2008	48.60809
2009	48.64352
2010	48.57268
2011	48.48246
2012	48.47323
2013	48.55977
2014	48.55242
2015	48.52552
2016	48.41388
2017	48.3879
2018	48.38355