Year	% of total labor force (national estimate)
1991	8.139185825504876
1992	9.297519906202702
1993	10.954365305155166
1994	11.522783299034215
1995	11.047307509845993
1996	11.115467145660238
1997	10.90469038593834
1998	10.494305423105608
1999	10.197074235112769
2000	9.826681577379798
2001	9.206057633187134
2002	9.555376826101819
2003	9.664106954592416
2004	9.883914577290954
2005	9.647527929615446
2006	8.698384696889581
2007	7.5122184205448255
2008	7.247650778388544
2009	9.20478090740566
2010	9.871293657201873
2011	9.926304921650432
2012	10.869615094908397
2013	11.341126716873662
2014	10.82249652911162
2015	10.022057442266426
2016	9.105017640570477
2017	8.130354279795219
2018	7.255396776033032
2019	6.683602824166361
2020	7.050571943077014
2021	7.022267257376004
2022	6.148134994081797
2023	6.023629055991374