Year	% of total labor force
1991	2.5551834451368047
1992	2.4765669143614595
1993	2.4042317437744885
1994	2.3603461841070024
1995	2.773665615749095
1996	2.7073770518132316
1997	2.648401623493534
1998	2.5905623303102856
1999	2.5216525617789003
2000	2.4825386181849414
2001	2.496834894589506
2002	2.4685708237780197
2003	2.418402006753263
2004	2.404850641460241
2005	2.363758738020287
2006	2.269081522841488
2007	2.2245717880167564
2008	2.1831718451769073
2009	2.1634594861405247
2010	2.1475129999673244
2011	2.131130413823389
2012	2.1288357909781186
2013	2.0992700211259328
2014	2.078120067318239
2015	2.0734089686156905
2016	2.0837137509678927
2017	2.103135004852599
2018	2.0609447696147987
2019	2.022769976271922
2020	2.0582672017380474