Year % of total employment (modeled ILO estimate) 1991 31.70919407623408 1992 31.53985850483003 1993 31.440992385070448 1994 31.83635640254149 1995 32.23351681239246 1996 33.79416027187855 1997 31.06247823625756 1998 34.57427948973131 1999 35.571851651763666 2000 36.866523510676 2001 34.33612085945172 2002 34.39234703020109 2003 35.33204311771343 2004 33.08308961609417 2005 31.60412493397661 2006 30.85034663392365 2007 29.84371206459076 2008 30.807221967304052 2009 31.44211962033048 2010 33.2372514230854 2011 33.00500136553943 2012 31.9133470276435 2013 31.68902117992296 2014 31.5313481187885 2015 31.411284481837107 2016 31.647601744220147 2017 32.791834353372934 2018 34.46400293644814 2019 37.30865805097691 2020 38.74107157343744 2021 38.72116249259009 2022 38.597824296721775