Year	% female
1971	38.99243
1972	38.71917
1973	38.69721
1974	38.45798
1975	38.59183
1976	39.06251
1977	39.22851
1978	39.72979
1979	40.43902
1980	40.81119
1981	41.57882
1982	42.42209
1983	43.03482
1984	43.73552
1985	44.11232
1986	44.50805
1987	44.57382
1988	44.72751
1989	45.13075
1990	45.47623
1991	45.80821
1992	46.06802
1993	46.38824
1994	46.62186
1995	46.86052
1996	47.10816
1997	47.27675
1998	47.30637
1999	47.37647
2000	47.43467
2001	47.60122
2002	47.62161
2003	47.67399
2004	47.70452
2005	47.73254
2006	47.74068
2007	47.74378
2008	47.81981
2009	47.98828
2010	48.0089
2011	48.05773
2012	48.20321
2013	48.06126
2014	48.14546
2015	48.1586
2016	48.21524
2017	48.09085
2018	48.02835