Year	% female
1970	45.93158
1971	46.50835
1972	46.82608
1973	47.22657
1974	47.7691
1975	48.21291
1976	48.44589
1977	48.68548
1978	48.76956
1979	48.78615
1980	48.52482
1981	48.43634
1982	48.50227
1983	48.63204
1984	48.41993
1985	48.52412
1986	48.46817
1987	48.52545
1988	48.35794
1989	48.11263
1990	47.99304
1991	47.87712
1992	48.46607
1993	48.50602
1994	48.76815
1995	48.71153
1996	48.82384
1997	48.88016
1998	49.07169
1999	49.52732
2000	49.93645
2001	49.3021
2002	49.27353
2003	49.13367
2004	49.08166
2005	49.18176
2006	49.35995
2007	49.03593
2008	49.13715
2009	49.72251
2010	49.34517
2011	49.34102
2012	49.73354
2013	49.72848