Year	Percent of total labor force
1980	6.133
1981	5.783
1982	7.183
1983	9.967
1984	8.967
1985	8.258
1986	8.117
1987	8.108
1988	7.208
1989	6.142
1990	6.942
1991	9.608
1992	10.742
1993	10.883
1994	9.717
1995	8.483
1996	8.525
1997	8.367
1998	7.692
1999	6.867
2000	6.292
2001	6.775
2002	6.358
2003	5.942
2004	5.383
2005	5.042
2006	4.792
2007	4.375
2008	4.25
2009	5.575
2010	5.208
2011	5.083
2012	5.225
2013	5.658
2014	6.067
2015	6.042
2016	5.717
2017	5.583
2018	5.292
2019	4.793
2020	4.792
2021	4.792
2022	4.788
2023	4.795
2024	4.79