Year	% of total labor force
1991	3.6825557989403443
1992	3.536418479554765
1993	3.411079551857241
1994	3.2614437363099444
1995	3.6477102682208695
1996	3.46860908775581
1997	9.026250161001933
1998	8.774791215874934
1999	8.623840010138968
2000	7.819011008796271
2001	6.958888955950458
2002	7.07214216449045
2003	7.691357839056515
2004	7.383088789025777
2005	7.16736659363392
2006	6.803704963649067
2007	6.5311703035899145
2008	6.037848269957619
2009	5.113692109971769
2010	4.931625931993714
2011	4.80198325812612
2012	4.634113796378421
2013	4.549273626479978
2014	4.42030910418962
2015	4.293776961559351
2016	4.2412172178477086
2017	2.3314867574430553
2018	1.699588267540543
2019	1.6726006189756257
2020	1.680051073552636