Year % of total labor force 1991 1.841455181019648 1992 1.6762819382774785 1993 1.5825355273498982 1994 1.6088992879479656 1995 2.197131372040255 1996 2.078118355520815 1997 2.010702227428493 1998 1.9967036659180113 1999 1.9236857907518774 2000 1.853520310708846 2001 1.532381599190127 2002 1.4558368898034506 2003 1.356718405982184 2004 1.2178396686853876 2005 1.232538331070501 2006 1.1137690974035708 2007 1.0886850182944103 2008 1.0655743862373188 2009 1.005129657859769 2010 0.9929299314049971 2011 0.9515088890720154 2012 1.056415355590819 2013 1.0473286105890474 2014 1.0531032471897257 2015 1.0542396699358088 2016 1.0358369452417044 2017 1.0021530997742418 2018 1.0414093138141547 2019 1.024675352390493 2020 1.065953529542689