Year	% female
1971	31.70315
1972	36.04176
1973	31.61468
1974	31.48296
1975	31.26615
1976	33.64815
1977	34.49255
1978	33.94846
1979	34.56446
1981	33.33062
1982	33.01535
1983	32.61702
1984	32.43909
1985	31.50199
1986	31.66858
1987	30.7411
1988	30.94277
1989	30.77551
1990	30.93684
1991	31.53079
1992	31.51033
1993	31.71055
1994	32.67075
1995	33.50161
1996	34.34105
1997	35.91912
1998	36.91658
1999	38.08462
2000	39.82026
2001	41.05395
2002	41.85417
2003	42.67666
2004	43.32641
2005	44.08453
2006	44.81621
2007	45.22834
2008	45.15508
2009	45.26378
2010	44.75541
2011	45.60272
2012	45.351
2013	45.39575
2014	45.49672
2016	44.67386