Year	Percent of total labor force (Units)
1999	14.525
2000	14.008
2001	13.358
2002	15.996
2003	18.188
2004	15.067
2005	12.242
2006	9.958
2007	8.492
2008	7.354
2009	7.879
2010	8.508
2011	8.204
2012	7.823
2013	7.470
2014	6.700
2015	7.400
2016	20.863
2017	27.886
2018	35.554