Year	% female
1974	50.69504
1975	50.90107
1976	50.95739
1978	51.25266
1979	51.46842
1980	50.96272
1981	51.46119
1982	51.50602
1983	51.52542
1984	51.90029
1985	51.0115
1987	51.59911
1991	53.04332
1992	53.37145
1993	58.14651
1994	57.05264
1995	57.54273
1996	57.02007
1997	57.63715
1998	57.10238
1999	55.52915
2000	54.91904
2001	54.53411
2002	54.06586
2003	53.26592
2004	52.7601
2005	52.51831
2006	52.5603
2007	52.25116
2008	52.1161
2009	51.88761
2010	51.74929