Year	% of total labor force
1991	0.38186740799859475
1992	0.34616659440439007
1993	0.33948873562229837
1994	0.33253100990221923
1995	0.4123488721037578
1996	0.403252122246942
1997	0.3925963837078979
1998	0.38218459743096267
1999	0.3721391193131879
2000	0.36070130775581377
2001	0.3491308135735629
2002	0.337750307419441
2003	0.26228876617214486
2004	0.22892091053084052
2005	0.2419687057839998
2006	0.23438351471362046
2007	0.2271066555308703
2008	0.22022943135109105
2009	0.21643016698077244
2010	0.21023172727252276
2011	0.2041476415906714
2012	0.1279595988893107
2013	0.18888918591802306
2014	0.21438851424409716
2015	0.23829115680402696
2016	0.26254310758706806
2017	0.2593536618575774
2018	0.2963386094776425
2019	0.290284990745438
2020	0.5593369156361679