Year % of total employment (modeled ILO estimate) 1991 21.3998904523784 1992 21.700024125406 1993 22.4000130192949 1994 22.6995811315208 1995 23.0000813806317 1996 23.4996379989633 1997 23.6998530094944 1998 23.5004357229191 1999 23.0005363579121 2000 22.499827550444 2001 22.2999611515552 2002 21.4001068842122 2003 21.6000336334076 2004 22.4994640619197 2005 23.8000169862534 2006 25.1993971424806 2007 26.7999678401847 2008 27.1998185748046 2009 27.8001237414816 2010 28.6998252249055 2011 29.5001335210074 2012 30.2995940788004 2013 30.0999024063236 2014 29.9004565977788 2015 29.2998153775056 2016 29.695781681681 2017 30.1023006345584 2018 30.5704554818329 2019 31.0257154660919 2020 31.5926812875811 2021 32.0757166294949 2022 32.1520079690103