Year	% female
1972	47.20675
1973	46.97281
1974	47.21952
1975	47.93872
1976	48.44106
1977	48.68119
1978	48.78927
1979	48.85567
1980	48.76694
1981	48.71581
1982	48.98883
1983	48.6858
1984	48.70978
1985	48.7822
1986	48.82941
1987	49.02614
1988	48.92512
1989	48.82085
1990	48.77232
1991	48.72922
1992	48.79181
1993	48.79311
1994	48.79276
1995	48.77255
1996	48.89104
1997	48.88195
1998	48.79893
1999	48.80704
2000	48.78177
2001	48.84406
2002	48.85129
2003	48.8276
2004	48.83588
2005	48.86625
2006	48.93988
2007	48.88902
2008	48.76148
2009	48.76999
2010	48.74431
2011	48.69667
2012	48.67917
2013	48.70649
2014	48.80148
2015	48.77024
2016	48.80921
2017	48.77387