Year	% of total labor force
1991	0.4636882945819595
1992	0.45345419807743387
1993	0.44193516840939917
1994	0.4307191831701718
1995	0.965349389318643
1996	0.9692172417282059
1997	0.9599591090044192
1998	0.934358760151851
1999	0.87594744506935
2000	0.8484227585246039
2001	0.8265005745910078
2002	0.7990270101395601
2003	0.7852328448668703
2004	0.7800989778682172
2005	0.742830698651919
2006	0.8219622110831444
2007	0.777517833519995
2008	0.7675495139697631
2009	0.7455095582594644
2010	0.7481374054567935
2011	0.7514397768539403
2012	0.7341221493731759
2013	0.7241053995348565
2014	0.7322169275204109
2015	0.7189022237887732
2016	0.7087808405044806
2017	0.6971240415057722
2018	0.7180684755756104
2019	0.7055580184756757
2020	0.7488512209517958