Year % of total labor force 1991 44.305067348809594 1992 44.21493840833191 1993 44.14244173616674 1994 44.08336276048041 1995 44.032062158813865 1996 43.928918155958904 1997 43.8410136867876 1998 43.762402364365634 1999 43.68608352267802 2000 43.61023227976762 2001 43.489130649815024 2002 43.38583992642147 2003 43.29021356187994 2004 43.20282778180783 2005 43.124616485674004 2006 43.01649511176192 2007 42.92923963023251 2008 42.858663936817486 2009 42.802458071556075 2010 42.756336503873975 2011 42.6975508551114 2012 42.34857857223118 2013 42.02352103998616 2014 41.73168912595842 2015 41.72924321884806 2016 41.71864331097256 2017 41.71949504328339 2018 41.72762383367701 2019 41.74502084443255 2020 41.737785782695966 2021 41.81830485145421 2022 41.8100304710271 2023 41.851705038640276