Year	% of total labor force
1991	3.665093362976455
1992	3.146105889144398
1993	3.051509299563297
1994	2.839652772799728
1995	2.9948394276769057
1996	2.933181629508103
1997	2.8443728557343677
1998	2.7622406054334823
1999	2.674080379250699
2000	3.0652094350253996
2001	2.9618425497046132
2002	2.8195475163917347
2003	2.7050772538609316
2004	2.6008842277154356
2005	2.523722996163941
2006	2.6696474763878024
2007	2.518938341575448
2008	2.399618561473035
2009	2.397707445026057
2010	2.2560813624484406
2011	2.1439383372337515
2012	2.0449345206217684
2013	1.9903672556016967
2014	1.937896093632975
2015	1.8710724682362199
2016	1.8005951486024376
2017	1.809494547138446
2018	1.735098993938652
2019	1.6273228014981962
2020	1.7630350811471283