Year	% of female population ages 15+ (national estimate)
1960	7.88
1970	8.63
1981	7.14
1983	11.89
1984	12.09
1989	8.25
1991	10.24
1993	19.5
1995	20.154
1997	11.3
1998	16.71
1999	20
2000	20.63
2001	21.32
2002	23.46
2003	18.84
2006	14.96
2007	14.08
2008	14.72
2009	13.01
2010	12.94
2011	14.8