Year	% female
1971	44.49097
1972	44.76329
1973	45.10989
1974	45.51334
1975	45.91351
1976	46.17779
1977	46.49867
1978	46.97695
1979	47.37271
1980	47.75566
1981	48.04413
1982	48.34762
1983	48.47195
1984	48.53959
1985	48.59853
1986	48.62834
1987	48.65333
1988	48.65388
1989	48.67979
1990	49.00958
1991	48.81636
1992	48.84672
1993	48.82856
1994	48.8033
1995	48.7551
1996	48.8096
1997	48.78002
1998	48.6637
1999	48.612
2000	47.77236
2001	48.13617
2002	47.82105
2003	48.0197
2004	48.48804
2005	48.43606
2006	48.38953
2007	48.34228
2008	48.33281
2009	48.36779
2010	48.28044
2011	48.15354
2012	48.16523
2013	48.18697
2014	48.12078
2015	48.09331
2016	48.20486
2017	48.00923