Year	% female
1971	53.06163
1972	52.85097
1973	53.18208
1974	51.97867
1975	49.83802
1976	50.1788
1977	50.88475
1978	50.49127
1979	50.52502
1982	50.44531
1983	50.55552
1984	50.62041
1985	50.26136
1987	50.19599
1988	49.90595
1989	50.34419
1990	50.3808
1991	50.52847
1992	50.08586
1993	50.38056
1994	50.61476
1995	50.67444
1996	50.86977
1997	51.03355
1998	50.45991
1999	51.5942
2000	51.75293
2001	51.25415
2002	51.82917
2003	51.39182
2004	51.27143
2005	50.61546
2007	51.17204
2008	51.30531
2009	51.15068
2010	51.96736