Year % of total labor force 1991 46.01882100670795 1992 46.15616525304198 1993 46.33797975282317 1994 46.55069949488114 1995 46.790577710672245 1996 46.939271999592364 1997 47.0258112958133 1998 47.0914096418886 1999 47.175201637276956 2000 47.24084870462565 2001 47.27313082259371 2002 47.330734229073705 2003 47.39386439148206 2004 47.451642961046936 2005 47.50518429011157 2006 47.468703437890554 2007 47.401283177838486 2008 47.333839333337814 2009 47.271568061143356 2010 47.13189082727967 2011 47.12922773161076 2012 47.05623319738747 2013 47.069035061254276 2014 47.045640352303266 2015 47.039327228319884 2016 47.04984289792912 2017 47.153281334966344 2018 47.19685664483657 2019 47.24233724075153 2020 47.23490627297042 2021 47.38629627474181 2022 47.27851704263397 2023 47.34669479653648