Year	% of total labor force
1991	1.8994955783964036
1992	1.8338059507294182
1993	1.762267585227666
1994	1.6959939008828857
1995	2.120772044344836
1996	2.069420589843851
1997	3.2819082681132006
1998	3.16382117403246
1999	3.4845003517253734
2000	3.4189864878338074
2001	3.3370563598422667
2002	3.3978402818401094
2003	3.2304281002665443
2004	3.262483075869044
2005	3.2170145580497667
2006	3.3142979508211767
2007	3.2602818699141674
2008	3.210678987471046
2009	3.1672246270194964
2010	2.9283085085641023
2011	2.865959127736485
2012	2.8086127011629003
2013	2.6895715509127753
2014	2.812222529076404
2015	2.7089677850609992
2016	2.6613627351828293
2017	2.626524316229551
2018	2.5929354696067883
2019	2.556034196028471
2020	2.7438014915170243