Year	% female
1971	44.79121
1972	45.36399
1973	45.82002
1974	46.09868
1975	46.29579
1976	46.76924
1977	46.84507
1978	47.10508
1979	47.36752
1980	47.49364
1981	47.69688
1982	47.88676
1983	48.002
1984	47.98862
1985	48.23861
1986	47.8035
1987	47.73435
1988	47.27002
1989	47.26572
1990	46.97832
1991	46.93327
1992	47.15032
1993	47.696
1994	47.16946
1995	47.54927
1996	47.45817
1997	47.84264
1998	47.97556
1999	47.77558
2000	47.87548
2001	48.1272
2002	48.2305
2003	48.55042
2004	48.49824
2005	48.38194
2006	48.39151
2007	48.35792
2008	48.38402
2009	48.40813
2010	48.45676
2011	48.46572
2012	48.33248
2015	49.09752
2016	49.09864
2017	49.01601