Year % of total labor force 1991 47.295500941589786 1992 47.42919945011194 1993 47.59277965052437 1994 47.7752823023478 1995 47.728129637630595 1996 47.59379355247882 1997 47.49420871235663 1998 47.490076804652674 1999 48.28391397137673 2000 47.141442091054486 2001 48.22597499397137 2002 47.343527664004725 2003 47.865738223343286 2004 48.130754931697744 2005 47.783305871317154 2006 47.10289792731095 2007 47.271592947331854 2008 46.39023066157157 2009 45.8977981702711 2010 46.158173536278156 2011 45.85222923889633 2012 45.778932978958764 2013 45.32725421104155 2014 45.68559403309413 2015 46.31949672137893 2016 45.76413989666679 2017 46.36227750678771 2018 47.1125976885585 2019 47.01249221526175 2020 47.115606617479656 2021 47.462125996042744 2022 47.17918195406985 2023 47.14369047612624