Year % of total employment (modeled ILO estimate) 1991 23.327573594064557 1992 23.4112672389551 1993 23.796312754998276 1994 23.811783721715145 1995 24.277811479702137 1996 24.588893818957896 1997 24.988790445901763 1998 25.081377130361968 1999 25.39135661258611 2000 25.599165915533156 2001 26.498693310254893 2002 27.67827749478903 2003 28.582119510582288 2004 29.368275745597543 2005 30.226220268270055 2006 29.91931684897635 2007 29.541936651856744 2008 29.16164329972906 2009 28.88609305822713 2010 28.509440024622744 2011 29.08452149106191 2012 29.686350918516975 2013 30.311845305952815 2014 31.069367339775578 2015 31.8562742423286 2016 32.52675335130627 2017 33.6254620043815 2018 34.55653573500975 2019 35.17525418881586 2020 33.2779943011821 2021 33.176316310542425 2022 32.945687123043996