Year	% of total labor force
1991	11.531645605397262
1992	11.185170218826341
1993	10.757788652167735
1994	8.253527738301269
1995	13.408542377811816
1996	12.82808307456899
1997	9.976313248777085
1998	9.59422911601956
1999	9.069883451997642
2000	8.674881256436475
2001	8.619830512833703
2002	8.447386236260138
2003	8.326527810602888
2004	7.950353014831335
2005	7.831335621112452
2006	7.244850284536526
2007	6.91135268098437
2008	6.729230046867997
2009	6.7739050352301895
2010	6.647499435045024
2011	2.8382242474599884
2012	3.183692625566268
2013	3.5599159859827303
2014	6.167521764425735
2015	6.445903192986857
2016	7.167481312103603
2017	5.465560565271599
2018	5.631916321315371
2019	5.473096272984207
2020	5.38762996155155