Year	% of total labor force (national estimate)
2000	7.54
2001	7.84
2002	12.55
2003	9.92
2004	8.53
2005	8.11
2006	8.27
2007	8.1
2008	8.22
2009	8.41
2010	6.007
2011	5.824
2012	4.67
2013	4.296
2014	4.051
2015	3.364
2016	3.249
2017	2.655
2018	3.673
2019	4.252
2020	4.63
2021	4.096