Year	% female
1971	25.20655
1972	25.09999
1973	26.10022
1974	25.36383
1975	26.55249
1976	26.27581
1977	26.7197
1985	27.37609
1986	28.23415
1987	28.23096
1988	28.58447
1989	29.58004
1990	30.46334
1991	31.01063
1992	32.05213
1993	32.10239
1994	32.32234
1995	32.48097
1996	32.89963
1997	34.25186
1998	35.35295
1999	36.74262
2000	37.78744
2001	38.72208
2002	39.12741
2003	39.70473
2004	39.46981
2005	40.1337
2006	40.24941
2007	40.88966
2008	41.09397
2009	41.19106
2010	42.01653
2011	42.58751
2012	42.84657
2013	43.01192
2014	42.89009
2015	43.28837
2016	43.36174