Year	Percent of total labor force
1992	3.178
1993	6.951
1994	6.951
1995	6.951
1996	20.711
1997	15.167
1998	13.958
1999	14.067
2000	14.342
2001	13.483
2002	12.492
2003	11.642
2004	11.75
2005	10.05
2006	7.042
2007	6.058
2008	7.742
2009	17.567
2010	19.467
2011	16.208
2012	15.048
2013	11.868
2014	10.847
2015	9.875
2016	9.642
2017	8.715
2018	7.415
2019	7.346
2020	7.309
2021	7.325
2022	7.341
2023	7.311
2024	7.261