Year	% of total labor force
1991	0.4362625963314182
1992	0.35946215925337144
1993	0.33879155278394896
1994	0.32608311457070155
1995	0.4166684417990732
1996	0.4137723700950776
1997	0.41539523112283155
1998	0.384354045721879
1999	0.38084911160359847
2000	0.36680512464884274
2001	0.4263268851251117
2002	0.4247379551262167
2003	0.408198632534581
2004	0.3535438394592427
2005	0.3657300671014961
2007	0.34628928229603645
2008	0.3354250560703776
2009	0.3281296235065079
2010	0.32526449742413105
2011	0.31310634982723645
2012	0.30737965915165416
2013	0.30450015185494633
2014	0.30180828429575723
2015	0.32145256580983955
2016	0.31393427527180134
2017	0.31738288314905055
2018	0.32408369817040794
2019	0.3828513790562118
2020	0.3291975091060084