Year	% of total labor force (national estimate)
1998	1.4
1999	1.4
2001	1.9
2003	1.8
2004	2.49
2005	3.1
2006	3.13
2007	3.7
2009	3.96
2010	3.32
2011	3.23
2012	2.05
2013	2.87
2014	2.63
2015	2.45
2018	3.35
2019	2.72
2020	5.03
2021	4.804
2022	5.947
2023	3.126