Year	% female
1971	46.80925
1972	46.91627
1973	47.01056
1974	47.0446
1975	47.19506
1976	47.28659
1977	47.4456
1978	47.54119
1981	48.19675
1991	48.55967
1992	48.60131
1993	48.50706
1998	48.50609
1999	48.26154
2000	48.28739
2001	48.39119
2002	48.34699
2004	48.38611
2005	48.14422
2006	48.40894
2007	48.36085
2008	48.35827
2009	48.41484
2010	48.36357
2011	48.36027
2012	48.34392
2013	48.36159
2014	49.01976
2015	47.12686
2016	48.65536
2017	48.52812
2018	48.52339