Year	% of total labor force (national estimate)
1991	6.549872025657208
1992	7.281537545311905
1993	7.735867417174674
1994	7.836137292151602
1995	7.588271640987688
1996	7.5586227341377406
1997	7.264124586457308
1998	7.235927853937063
1999	7.181451308227154
2000	6.775067955037724
2001	6.62681262048359
2002	7.135276502711051
2003	7.260565026122465
2004	7.18094422682561
2005	6.83331421491884
2006	6.185089480379502
2007	5.886543813781262
2008	6.2006277377599845
2009	8.370352065242793
2010	8.51063326603937
2011	8.116092728287782
2012	8.101719886196722
2013	7.986982306690411
2014	7.412686482539699
2015	6.860050902052947
2016	6.435541378587221
2017	5.916705267346898
2018	5.476638101154809
2019	5.385112592959567
2020	7.143142389995773
2021	6.193023739231722
2022	4.985426589984399
2023	4.8299600532299385