Year	% of total labor force
1991	3.9480307551595826
1992	3.5022478063193287
1993	3.3788142205075595
1994	2.0793602699603735
1995	2.6566253927185364
1996	2.6158792307627396
1997	2.5405178261956225
1998	2.4844420211808753
1999	2.4434781466349627
2000	2.3872045834328
2001	2.831363489442522
2002	2.7637213875348827
2003	3.3907451759486325
2004	2.098635886673662
2005	2.0503707753818814
2006	2.002002002002002
2007	1.9534429431873679
2008	1.2697525887080903
2009	1.3315107017750039
2010	1.2961989137459706
2011	1.2586446446133912
2012	1.2231592401621016
2013	1.1883530348141378
2014	1.154622787420519
2015	0.7740113092618716
2016	0.751767921640442
2017	0.6562939409302638
2018	0.7090526101102935
2019	0.6191040017334912
2020	0.6066875164943168