Year	% female
1973	40.85929
1974	41.07002
1975	41.15941
1976	41.06096
1977	41.67848
1978	42.67427
1979	42.57918
1980	42.22036
1981	41.3931
1982	41.09581
1983	41.5678
1984	41.75265
1985	42.1709
1986	42.30724
1987	42.65249
1988	42.77025
1989	43.04929
1990	43.51945
1991	43.84246
1992	44.42784
1993	44.68232
1994	45.28037
1995	45.66161
1996	45.98363
1997	46.3704
1998	46.75825
1999	47.08045
2000	47.27872
2001	47.35071
2002	47.48545
2003	47.55125
2004	47.69396
2005	47.80237
2006	47.94599
2007	48.05953
2008	48.15003
2009	48.31321
2010	48.45543
2011	48.51229
2012	48.66626
2013	48.68183
2014	48.78891
2015	48.55966
2016	48.71544
2017	48.75966
2018	48.84732