Year % of total labor force 1991 46.51162236091205 1992 46.443064239617115 1993 46.36461311018288 1994 46.41754441108629 1995 46.558015998182846 1996 46.596270489823745 1997 46.751390506371905 1998 46.91550684731835 1999 47.01437785394378 2000 47.16563581444744 2001 47.204084505517116 2002 47.21316851842573 2003 47.2277943439169 2004 47.24686789976454 2005 47.265485004366056 2006 47.27974589178257 2007 47.29430993732582 2008 47.3191926961052 2009 47.357507858668605 2010 47.40420632868096 2011 47.43187721770428 2012 47.435869974452615 2013 47.45449485733112 2014 47.41023626635112 2015 47.42839018851631 2016 47.45942820501891 2017 47.49798492042779 2018 47.551742074412324 2019 47.58408995069306 2020 47.63424227870449 2021 47.90375158612498 2022 47.70130909954259 2023 47.75341240482555