Year	% female
1971	72.17501
1976	69.026
1977	67.10445
1978	63.53427
1979	61.21362
1980	57.80077
1981	52.48562
1982	52.92575
1983	47.92478
1984	45.32778
1985	45.59817
1986	45.41337
1987	44.85155
1988	44.40755
1989	44.46803
1990	44.87371
1991	45.62119
1992	46.0816
1999	54.34385
2000	51.03304
2002	49.81339
2003	48.35486
2004	52.61025
2005	51.6915
2006	49.09672
2007	49.87658
2008	49.00731
2009	47.64015
2011	49.64768
2012	48.26719
2013	44.11121
2014	45.1497
2015	44.24293
2016	45.37269
2017	45.34833
2018	46.87041