Year	% female
1971	46.97829
1972	49.05533
1973	47.19636
1974	46.8003
1990	47.40853
1991	47.73533
1992	48.13319
1993	48.0905
1999	47.29064
2000	47.31497
2001	47.24175
2002	47.03615
2003	46.83541
2004	46.72703
2005	46.7795
2006	47.18328
2007	46.90575
2008	47.08564
2009	47.25831
2010	47.623
2011	47.77381
2012	47.69937
2013	47.8566
2014	48.02729
2015	47.85997
2016	47.91194
2017	48.00267
2018	48.17859