Year	% female
1970	27.7423
1971	27.82571
1972	26.02452
1973	27.42706
1974	28.29476
1975	29.08395
1976	30.49892
1977	31.63978
1978	32.12706
1979	32.99659
1980	33.26993
1981	34.04485
1982	34.47104
1983	34.95837
1984	35.77916
1985	36.77345
1986	38.4372
1987	39.59306
1988	41.06109
1989	42.59426
1990	42.01464
1991	43.24389
1992	43.4024
1993	43.28659
1994	43.86618
1995	44.44507
1996	45.73792
1997	44.52566
1998	46.48418
1999	46.0964
2000	45.91441
2001	46.22453
2002	45.54742
2003	45.69898
2004	46.14804
2005	46.64492
2006	46.99677
2007	46.7721
2008	44.44353
2009	44.56193
2010	44.45771
2011	46.36618
2012	46.32368
2013	47.94003
2016	50.03324
2017	50.32299
2018	50.96924