Year	% of total labor force
1991	3.9657987680349285
1992	3.593151554175395
1993	3.4580439297989125
1994	3.2540406717025006
1995	4.321877608846617
1996	4.317178686789101
1997	4.262877108691813
1998	4.192870417007887
1999	3.8667077624461403
2000	3.859164652173796
2001	3.85591039714359
2002	3.752127458757735
2003	3.630767968458208
2004	3.253776407994812
2005	3.25231914019555
2006	3.6758483984954324
2007	3.215050819128264
2008	3.3171347539382325
2009	3.2362092411307155
2010	3.1945675272585468
2011	3.0444295412560125
2012	2.966595353725369
2013	2.3582139647716187
2014	2.3322624912810066
2015	2.339174887303677
2016	2.208433707570747
2017	2.1597780439426058
2018	2.212382054805856
2019	2.1874065669355653
2020	2.287408496488705