Year % of total labor force 1991 47.41370920751305 1992 46.98255007579912 1993 47.31640990154302 1994 47.39520365770558 1995 47.51207839174298 1996 47.839923817352684 1997 48.42910889842113 1998 47.88851527434856 1999 48.126759611702965 2000 48.71277147772199 2001 48.7378561908229 2002 48.78253581271853 2003 48.471656693166686 2004 49.28851873884593 2005 49.838449594777735 2006 49.151227083131246 2007 48.589460965840935 2008 48.784143760169336 2009 48.997696053619116 2010 49.47682385425011 2011 49.27302946595682 2012 49.012037047878884 2013 48.930222430165045 2014 48.33971268450314 2015 48.652604516637936 2016 48.388688550210404 2017 48.286525600701616 2018 48.29934196036416 2019 48.4877869834937 2020 48.34448186664659 2021 48.781195589088796 2022 49.21795437341045 2023 49.46951100384228