Year	% female
1971	42.60278
1974	65.83799
1975	66.07806
1976	70.61632
1977	65.33525
1978	67.25686
1979	67.0101
1980	67.18321
1981	66.25614
1982	62.86519
1983	62.12983
1984	60.89853
1985	59.75568
1986	62.25417
1987	61.32118
1988	61.78204
1989	63.45978
1990	63.22022
1991	63.33855
1992	53.72622
1993	57.00938
1994	59.30882
1995	58.45693
1996	57.85445
1997	56.54312
1998	55.55374
1999	55.91182
2000	56.10705
2001	55.94077
2002	57.09302
2003	59.25243
2004	57.39665
2005	56.63269
2006	56.0685
2007	55.60036
2008	55.42628
2009	56.41043
2010	56.20958
2011	55.97879
2012	56.3016
2013	52.61918
2014	52.87227
2015	53.57774
2016	54.02772
2017	53.58518