Year % of total labor force 1991 42.437601113067494 1992 42.66706474460095 1993 42.850729227626886 1994 43.015484001479685 1995 43.21127416232001 1996 43.45643229966227 1997 43.72905650047903 1998 44.01519513763628 1999 44.32110341182539 2000 44.6420570891704 2001 44.931782064542766 2002 45.184780331989316 2003 44.753354597600385 2004 44.805399656775755 2005 45.09965903555772 2006 45.67007860872527 2007 44.78632709571854 2008 45.19017314228714 2009 46.117056039974194 2010 45.97906055313305 2011 45.04218188382329 2012 45.32775490663337 2013 45.79592535821681 2014 46.24556503100457 2015 46.30144858765998 2016 46.04373467131429 2017 45.86337440621157 2018 46.11548544728207 2019 45.80093028894862 2020 45.30297182990516 2021 45.72716007790887 2022 46.29380365066979 2023 47.08044450789206