Year % of total employment (modeled ILO estimate) 1991 3.45745976785068 1992 3.51338339169303 1993 3.55907855614422 1994 3.64981452203163 1995 3.7007351613989 1996 3.86512097123528 1997 4.54683498742094 1998 3.74588397614862 1999 4.16431943315248 2000 4.32005324869764 2001 3.96210108401745 2002 4.00406601995232 2003 4.1063297160645 2004 4.1880863820574 2005 3.83911369413376 2006 4.04395350125633 2007 4.00487085366185 2008 3.78575641983562 2009 4.06741214135212 2010 4.17054896753215 2011 4.09099290683059 2012 4.02303069248113 2013 4.015827815939 2014 4.2319683515997 2015 4.2324279318662 2016 4.04733386811032 2017 3.80794221615427 2018 3.58301892495693 2019 3.78097594023283 2020 3.7059411863457 2021 3.8696314662494 2022 3.41327510686081