Year	Percent of total labor force
1980	4.019
1981	3.911
1982	4.358
1983	6.241
1984	7.186
1985	3.922
1986	4.2
1987	4.225
1988	5.8
1989	7.325
1990	7.975
1991	10.625
1992	10.675
1993	9.8
1994	8.35
1995	6.45
1996	6.325
1997	6.875
1998	7.725
1999	7.05
2000	6.15
2001	5.475
2002	5.3
2003	4.75
2004	4.025
2005	3.8
2006	3.875
2007	3.575
2008	4
2009	5.825
2010	6.15
2011	5.975
2012	6.375
2013	5.75
2014	5.375
2015	5.375
2016	5.125
2017	4.7
2018	4.245
2019	4.357
2020	4.393
2021	4.332
2022	4.392
2023	4.441
2024	4.464