Year	% of total labor force (national estimate)
1986	13
1990	15
1991	18.9
1993	19.7
1996	15.3
1998	12
2000	12.93
2005	15.9
2008	7.93
2010	13.19
2012	7.85
2015	11.888
2017	8.518
2018	5.031
2019	5.539
2020	6.032
2021	5.195
2022	5.993