Year	% of total labor force
1991	0.3610561252720332
1992	0.35081072358219845
1993	0.34038178923389417
1994	0.33016921172100705
1995	0.4020200704499971
1996	0.3917129214341394
1997	0.38066930800410514
1998	0.3662103956403947
1999	0.35926482919472225
2000	0.37670485105159945
2001	0.2859220168122146
2002	0.2359224101035932
2003	0.23321454507292164
2004	0.12681029623519252
2005	0.1859429601375482
2007	0.17930444220778755
2008	0.1758021265025222
2009	0.18085425214183107
2010	0.17754821138495497
2011	0.17560584014851235
2012	0.4545145282919958
2013	0.45651383629021736
2014	0.46340994665383906
2015	0.46558285832456436
2016	0.4575235680775421
2017	0.4408736131080543
2018	0.548821008111196
2019	0.5281847294400133
2020	0.5176503230655666