Year	% female
1970	48.48889
1971	48.54104
1972	48.4419
1973	48.6376
1974	48.96295
1975	49.12876
1976	49.30814
1977	49.5038
1978	49.74677
1979	49.87643
1980	49.93528
1981	49.75607
1982	49.73943
1983	49.53108
1984	49.60454
1985	49.54753
1986	49.73841
1987	49.7675
1988	49.75964
1989	49.89672
1990	49.66237
1991	49.54253
1992	49.42785
1993	49.19177
1994	49.21729
1995	49.08622
1996	48.91152
1997	48.92216
1998	48.63803
1999	48.65308
2000	48.38728
2001	48.63413
2002	48.05656
2003	48.47921
2004	48.12779
2005	48.04554
2006	47.93414
2007	47.90817
2009	47.61637
2010	47.54246
2011	46.99588
2012	47.52445
2013	47.4912
2014	47.55757
2015	47.53857
2016	47.65592
2017	47.63762