Year % of total labor force 1991 47.071874550047774 1992 47.08615965569196 1993 47.11669636821729 1994 47.12499925556687 1995 47.1221524912451 1996 47.14425250467446 1997 47.17496324301617 1998 47.19980422580679 1999 47.218727669810086 2000 47.35128135750454 2001 47.53332025740891 2002 47.687692314664176 2003 47.79524599226092 2004 47.89203051536778 2005 47.986548899302164 2006 48.07533325381581 2007 48.15488377694809 2008 48.22280875829964 2009 48.29206198729368 2010 48.331235785534766 2011 48.36269837800026 2012 48.397610764314514 2013 48.4113865298277 2014 48.42750845849219 2015 48.438452237789356 2016 48.43209668763556 2017 48.42443312078263 2018 48.41881693705093 2019 48.415693075688154 2020 48.40659688454876 2021 48.56094073935219 2022 48.35563497787778 2023 48.424920879868175