Year % of total labor force 1991 51.07800812547101 1992 51.194397560842816 1993 51.4227325615022 1994 51.50041828851476 1995 51.426247415460466 1996 51.441668202445086 1997 51.4437361220543 1998 51.48063153300539 1999 51.463823331635616 2000 51.34896193771626 2001 51.20013248993522 2002 51.11338812412386 2003 51.06513097930022 2004 51.00821928674836 2005 50.92219202799795 2006 50.807936820397146 2007 50.6969811041216 2008 50.60526391570983 2009 50.55709090751866 2010 50.541122133264 2011 50.46459784879023 2012 50.44587228342884 2013 50.47051799873595 2014 50.59137620566491 2015 50.75236842240529 2016 50.881447471665666 2017 51.075118029261915 2018 51.22420421789581 2019 51.27607383397357 2020 51.19777107711455 2021 51.281987378188255 2022 51.067459356435805 2023 51.025107077623474