Year	% of total labor force
1991	3.8269804777051344
1992	3.7419915767270675
1993	3.680277510589631
1994	3.5773850879516815
1995	2.98696096014066
1996	3.050709876897006
1997	3.02041694701702
1998	3.0739285961602114
1999	3.039894333003371
2000	3.0064102351060904
2001	2.959998897804047
2002	2.9178910117631784
2003	2.916576698406455
2004	2.876649516710482
2005	2.848047774213677
2006	2.811612838636826
2007	2.780892439822412
2008	2.760569100096361
2009	2.628407259728604
2010	2.5944392610297404
2011	2.549192358267321
2012	2.510528039229256
2013	2.4761183175311055
2014	2.309437453167712
2015	2.283344932989494
2016	2.2609063859586156
2017	2.23635578699212
2018	2.1322937466102054
2019	2.127819616990386
2020	1.9897081384902606