Year % of total labor force 1991 45.402216408450144 1992 45.28743646877398 1993 45.49359795193977 1994 45.60012386381596 1995 46.29790132984233 1996 46.31137364864299 1997 46.300727872004394 1998 46.61324402814325 1999 46.764206552482776 2000 46.57252132980288 2001 46.76069118808334 2002 47.292981175099385 2003 47.12347816286464 2004 47.30692773914291 2005 47.13577751031848 2006 47.141579560159435 2007 47.30354177867268 2008 47.30789916482909 2009 47.451027155526404 2010 47.31712747051124 2011 47.4623970350824 2012 47.21300303089357 2013 47.325287157081924 2014 47.315929329254885 2015 47.14171616506918 2016 47.140079113489875 2017 47.2466447365085 2018 47.14034192368642 2019 47.1552545550048 2020 47.13414007606512 2021 46.48395763844192 2022 46.8915863266361 2023 47.060002213110586