Year	% of total labor force
1991	2.78062792139721
1992	2.754714694199122
1995	3.609559143915701
1996	3.5176144543803094
1997	2.5684554531978496
1998	2.528113960330988
1999	2.4904032599957837
2000	2.4356305689678113
2001	2.3160359757588234
2002	2.111204013377926
2003	2.021305763523236
2004	2.155117522476896
2005	2.043885550014355
2006	1.9850099435149264
2007	1.9106763260982391
2008	1.867927937946565
2009	1.8351881537324315
2010	2.112431035339729
2011	2.093059905836929
2012	2.0728134662968656
2013	2.056136559720688
2014	2.0230484722413946
2015	2.0522742417852693
2016	2.556033944130778
2017	2.556094287928046
2018	2.502095504985425
2019	2.4602856084055658
2020	1.9911684023017906