Year	% female
1971	47.78378
1976	51.23058
1977	51.0211
1978	51.1151
1979	51.01391
1980	51.0589
1981	51.12134
1982	51.34727
1983	51.47218
1984	51.67784
1985	51.48965
1987	51.2334
1988	50.99265
1989	51.57704
1990	51.89014
1991	52.11842
1992	52.38736
1993	53.62718
1994	52.9809
1995	53.81125
1996	54.29152
1997	54.66085
1998	54.90967
1999	53.42464
2000	53.53652
2001	53.34208
2002	52.78897
2003	52.69232
2004	47.9201
2005	50.41196
2006	50.35992
2007	50.35219
2008	50.45042
2009	50.51428
2010	50.55379
2011	50.50295
2012	50.16925
2013	52.28263
2014	52.25597
2015	51.7298
2016	51.06696
2017	49.68928