Year % of total labor force 1991 41.11352389906783 1992 41.70000167028699 1993 41.97534482959836 1994 43.196098546899826 1995 43.554937446034195 1996 43.47594483832087 1997 43.652943432566396 1998 43.87022126205985 1999 43.882542645576194 2000 43.948510943667024 2001 44.19605947720655 2002 44.68806148693254 2003 44.65065205753541 2004 45.331899346399965 2005 45.680634590719635 2006 45.84500346360295 2007 45.89238430809967 2008 46.12717267780585 2009 46.483584232674296 2010 46.590740281095115 2011 46.79141026670068 2012 46.945381456471615 2013 47.00181992072449 2014 47.12035538283506 2015 47.00000489936919 2016 46.964273883245895 2017 46.95287396349197 2018 46.80669379395834 2019 46.87911842607975 2020 47.04018418767114 2021 46.92957657561777 2022 47.01765062629358 2023 47.00576347555129