Year	% of total labor force
1991	4.2234083237724676
1992	2.0530416132287734
1993	1.975679996641344
1994	2.049665473800968
1995	1.972766175831088
1996	3.045643316009424
1997	3.812985940689434
1998	3.402691146736874
1999	3.25664176916646
2000	3.1981439033358074
2001	2.8552941528641593
2002	3.0827219644504567
2003	3.0256784259389398
2004	2.9469384235049545
2005	2.91731874730333
2006	2.8347990065878266
2007	2.75069714226486
2008	2.6685106461972565
2009	2.5872497928699225
2010	2.511247346937289
2011	2.4701707624211613
2012	2.4290985930428435
2013	2.3868351932704748
2014	0.3399691919918217
2015	0.37922564020398547
2016	0.36474751720924375
2017	0.7026526719333998
2018	0.33909794182808717
2019	0.6552751451188719
2020	0.6412399014734891