Year	% female
1971	26.58923
1972	27.03047
1973	28.37377
1974	28.41423
1975	28.66611
1976	29.53297
1977	28.736
1978	31.87077
1979	31.76421
1980	32.15616
1981	32.56331
1982	33.02021
1983	32.52743
1984	32.62633
1985	32.98184
1986	33.34351
1987	33.14335
1988	33.59192
1989	33.30092
1990	33.50624
2000	39.13313
2001	39.13313
2002	39.13298
2003	40.62616
2004	40.75837
2005	41.82714
2006	42.44712
2007	43.63643
2008	43.84477
2009	44.09896
2010	43.99662
2011	44.13689
2012	44.47322
2013	44.45621
2014	44.06973
2015	44.22964
2016	44.23964
2017	44.54258
2018	44.0147