Year	% female
1971	51.53531
1972	51.88768
1973	51.99766
1974	52.00827
1991	50.63759
1992	51.54799
1993	51.87319
1994	52.44372
1995	52.78579
1996	52.66015
1997	52.48222
1998	52.71964
1999	51.98662
2000	51.46894
2001	51.44285
2002	51.43382
2003	51.5936
2004	51.63084
2005	51.66812
2006	51.58217
2007	51.44587
2008	51.39544
2009	51.38825
2010	51.41629
2011	51.45301
2012	51.49384
2013	51.23464
2014	51.18003
2015	51.13167
2016	50.91943
2017	50.91438