Year	% of total labor force
1991	3.529266441970037
1992	3.430796545187879
1993	3.340878149821681
1994	4.0595289322627
1995	7.090187180941577
1996	6.942166413646316
1997	6.6721715153570536
1998	6.438485781973663
1999	6.0031834023985295
2000	5.822454826351901
2001	6.191594750548946
2002	6.630806603539735
2003	6.444269117496491
2004	5.86080586080586
2005	6.282698590390898
2006	5.017309718528925
2007	4.904204538023933
2008	4.7995392442325535
2009	4.8329876223268355
2010	4.739166521503008
2011	4.657650127393025
2012	4.619018371209284
2013	4.58556414832441
2014	4.5550346675070905
2015	4.52650328844347
2016	5.889080865354197
2017	3.8766639368491442
2018	3.7614161273010005
2019	3.6922849705540273
2020	3.679598923717315