Year	% female
1970	50.26342
1971	50.48611
1972	50.56233
1973	50.54863
1975	51.00005
1976	50.81317
1977	50.93433
1978	51.62239
1979	50.93617
1980	50.8227
1982	50.71185
1983	50.75728
1984	50.58982
1985	51.9358
1986	51.70869
1987	51.75776
1988	51.98923
1989	51.76172
1990	51.01061
1991	50.77035
1992	50.46487
1993	50.26048
1994	49.97807
1995	50.06598
1996	49.98125
1997	49.91998
1998	49.86119
1999	49.36257
2000	49.4383
2001	49.34671
2002	48.92131
2003	48.73282
2004	48.58767
2005	48.41639
2006	48.40334
2007	48.49249
2008	48.44045
2010	48.47268