Year	% of total labor force (national estimate)
1992	6.647959661798341
1993	6.4942434347443
1995	8.405191225776631
1996	8.896540478677194
1997	8.40128642278667
1998	9.020383056396179
1999	9.806403320472253
2001	9.16181786145614
2002	9.920928515930614
2003	9.537121659970934
2004	8.581256801134494
2005	8.442265108901573
2006	7.3345799375790754
2007	7.457679157200887
2008	6.834973059342788
2009	7.863275972506
2011	6.609799193239277
2012	6.422773537655113
2013	6.198842403660719
2014	6.025523257605061
2015	6.578769801669416
2016	7.693451610652115
2017	8.059897470904746
2018	8.083041817657621
2019	8.146253011765493
2020	10.519533852989634
2021	9.304023466427704
2022	6.950959148410947
2023	6.402139224300108