Year	% of total labor force
1991	0.5779485465894437
1992	0.5567852260380982
1993	0.5397748383239416
1994	0.5233112256145146
1995	0.5046055983720414
1996	0.48684833980456205
1997	0.4704631843347678
1998	0.45513492323087534
1999	1.1940277045241068
2000	1.2499660470215597
2001	0.864629437629262
2002	0.8336931696129437
2003	0.5167055452590946
2004	0.5580645976329721
2005	0.5408746031000095
2007	0.3822469556315156
2008	0.3698183227291949
2009	0.35758453512183647
2010	0.345341724269708
2011	0.33316169068356066
2012	0.3212915884604913
2013	0.31004100134975676
2014	0.29946199699227316
2015	0.28937745682509314
2016	0.2795867173456085
2017	0.27018087669935453
2018	0.2614359471699331
2019	0.25323710421242673
2020	0.2474144827975937