Year	% of female labor force (national estimate)
1970	5.8
1971	5.1
1972	5.4
1973	2.1
1974	3.9
1976	6.9
1977	7.1
1978	4.1
1979	3.8
1983	6.73
1984	8.2
1989	9.83
1991	14.04
1993	6.4
1994	12.5
1995	14.2
1999	15.2
2001	25.53
2002	24.08
2003	20.93
2006	23.77
2007	25.68
2008	24.19
2009	22.29
2010	22