Year	% female
1971	33.86087
1972	34.33661
1973	35.06177
1974	35.46992
1975	35.69028
1976	35.89895
1977	35.97672
1978	36.22489
1979	36.47599
1980	36.63745
1981	37.01423
1982	37.38371
1983	37.72531
1984	37.63963
1985	37.9107
1986	38.21084
1987	38.36999
1988	38.62577
1989	38.9255
1990	39.42797
1991	39.83551
1992	40.18889
1993	40.54482
1994	41.09197
1995	41.5611
1996	42.00532
1997	42.40678
1998	42.96702
1999	43.96694
2000	44.80602
2001	45.62884
2002	46.15091
2003	46.44024
2004	46.47576
2005	46.35572
2006	46.29177
2007	46.46473
2008	46.68899
2009	47.02521
2010	47.24494
2011	47.41941
2012	47.5664
2013	47.62555
2014	47.60013
2015	47.40253
2016	47.47179
2017	47.48732
2018	47.60808