Year % of total labor force 1991 46.296431651731545 1992 46.34543959626889 1993 46.3846047920683 1994 46.417301469258135 1995 46.588968216054916 1996 46.729969946927554 1997 47.045128269146744 1998 46.73713122593619 1999 47.33958656948262 2000 47.531527951472086 2001 47.665615683491936 2002 47.773311174991015 2003 47.63312138504798 2004 47.585326780526216 2005 47.67623464193385 2006 47.73721558202332 2007 47.74357418671493 2008 47.56132756132756 2009 47.2841423883564 2010 47.34504162621716 2011 47.40784545633747 2012 47.599654565446166 2013 47.46709455374168 2014 47.525835476754935 2015 47.53187154011216 2016 47.60816304791663 2017 47.76764261312504 2018 47.91647839016056 2019 47.96348374270397 2020 47.97394948874516 2021 48.251159967043925 2022 47.87130539806086 2023 48.01775025799794