Year % of total labor force 1991 44.242531892743926 1992 44.349881071106964 1993 44.49458494785654 1994 44.64705493604355 1995 45.270262543363266 1996 45.883382274768714 1997 46.23759204283884 1998 45.90588093590293 1999 45.74526848177965 2000 45.9835139669911 2001 45.796608399846896 2002 45.867971595881464 2003 45.93623740933333 2004 45.74656064723027 2005 46.270499392128514 2006 45.88743932772038 2007 46.08341354581152 2008 46.077848947152994 2009 45.7362703567854 2010 45.79378435343895 2011 46.33858499957318 2012 46.11203408283978 2013 45.579035586150965 2014 45.48167875700965 2015 45.584661480589574 2016 45.58664543683775 2017 45.532541394020065 2018 45.57628034070962 2019 45.69596276528697 2020 45.84516649950633 2021 45.98155255189022 2022 46.044651601578266 2023 45.92672509846065