Year	% of total labor force
1991	0.494406388096395
1992	0.4821278038083309
1993	0.4568273227848839
1994	0.43611084870865446
1995	0.6063408860118172
1996	0.5983299030846059
1997	0.5183617384600665
1998	0.5358942268809356
1999	0.5288172465987147
2000	0.5341574312360935
2001	0.5153108441167357
2002	0.5043019733998366
2003	0.49650917901285735
2004	0.49261984821360505
2005	0.48806051137210105
2006	0.4655896105361247
2007	0.3717567316159438
2008	0.37159723038601944
2009	0.37970649276042256
2010	0.3804623810863859
2011	0.3783773810858179
2012	0.38424110924453975
2013	0.3841895611062354
2014	0.38368724390030223
2015	0.36415589846275026
2016	0.3452807245804279
2017	0.3461008782965388
2018	0.3471692120026911
2019	0.32696130505432497
2020	0.3319432675407897