Year	% of male labor force (national estimate)
1970	7.2
1971	8.1
1972	4.5
1973	5.2
1974	5.3
1976	6.1
1977	4.6
1978	4.5
1979	3.8
1983	3.85
1984	4.1
1989	5.04
1991	5.15
1993	7.6
1994	6.8
1995	5.5
1999	6
2001	8.22
2002	8.3
2003	7.75
2006	5.28
2007	5.21
2008	8.35
2009	5.69
2010	6.23