Year % of total labor force 1991 1.725664300130251 1992 1.5210714878248086 1993 1.4677932017125532 1994 1.443643389058723 1995 1.725823456375212 1996 1.5626161297485581 1997 1.5281159503146484 1998 1.5195366198830087 1999 1.5216022572613648 2000 1.3667101346879102 2001 1.2905264210096796 2002 1.0580878768376532 2003 1.0632834111008287 2004 0.9356041562770809 2005 0.9207238048536126 2006 0.8519185407003795 2007 0.8180661733727642 2008 0.8135375839856662 2009 0.6803822919019376 2010 0.6723861955901657 2011 0.6504437563680675 2012 0.9453297263010436 2013 0.9443680802276502 2014 0.9389458481603321 2015 0.9420477532570196 2016 0.971056845145173 2017 1.0362025855261814 2018 1.0696670855606962 2019 1.0312416007008516 2020 1.035869814950901