Year	% of total labor force (national estimate)
1995	6.4741961630886635
1996	7.770800437698135
1997	8.329586281594095
1998	9.363213229300264
1999	10.653857624382297
2000	8.58200810994705
2001	8.722102663601564
2002	8.772812058075882
2003	8.597391829484819
2004	8.434965379869748
2005	7.9475885811913
2006	8.033806456328234
2007	8.365589069829351
2008	8.548120094920657
2009	10.315504430156276
2010	9.780604658556735
2011	8.717996432189132
2012	8.407607002018496
2013	8.361396043940703
2014	8.78482341034047
2015	8.80139467776804
2016	9.080898182565152
2017	9.017512508296937
2018	9.135286777064094
2019	9.65851235338408
2020	9.227096548261331
2021	9.907870817596589