Year	% of total labor force
1991	3.9365469755641787
1992	3.420929870937646
1993	3.4897490402427076
1994	3.838718718051601
1995	3.218563104687543
1996	3.247331547086698
1997	3.7704291650133928
1998	3.672642178926905
1999	3.6908328172075997
2000	3.7532521269902452
2001	2.9609864327521516
2002	2.913482838652609
2003	2.9284175035320072
2004	2.773102169457251
2005	2.715314541244308
2006	2.695818745481365
2007	2.658746382834195
2008	2.5788439467485973
2009	2.481560804557001
2010	2.375658064649689
2011	2.2712260491837557
2012	2.2255070564335275
2013	2.1443903249503697
2014	2.0953508411612933
2015	1.6944611242961367
2016	1.6423798147671438
2017	1.591677367743657
2018	1.5580648992130952
2019	1.5398863497706878
2020	1.6325827289774602