Year % of total labor force 1991 38.84333503497694 1992 38.85562523206236 1993 38.82151828525077 1994 38.89051223991662 1995 38.885646671052996 1996 38.864740360212174 1997 38.85003678921375 1998 38.87967927205202 1999 38.902482294460555 2000 38.89139414776949 2001 38.87615487811665 2002 38.86347559692474 2003 38.885671538719016 2004 38.87736164817382 2005 38.93751722924732 2006 38.85726697336132 2007 38.847886626159806 2008 38.720264578158826 2009 38.67311034766893 2010 38.53661105900299 2011 38.48549930790679 2012 38.4519844324085 2013 38.45696493933606 2014 38.48291057394979 2015 38.56019670850639 2016 38.61874206784825 2017 38.67650954848082 2018 38.683551746518965 2019 38.752669947461925 2020 38.56062250828147 2021 38.81453133583436 2022 38.690542301614194 2023 39.09314196108763