Year % of total employment (modeled ILO estimate) 1991 18.8084213423234 1992 18.83598849652 1993 18.8961381442074 1994 18.9820199329773 1995 19.0864572528345 1996 19.1180153916366 1997 19.0799337819394 1998 19.1358814590357 1999 18.9114471895322 2000 18.6186035791374 2001 15.6862394245456 2002 17.7545286349684 2003 20.5196835086219 2004 20.519356892669 2005 19.3949499455489 2006 17.4592449707079 2007 19.6700144739467 2008 20.0889154032358 2009 20.692192141455 2010 18.9030196643486 2011 17.6999575131238 2012 17.8347976521021 2013 16.7155636818382 2014 20.6135420112398 2015 20.9488523315106 2016 20.8795253864255 2017 20.135198119697 2018 19.5814943102005 2019 20.7185374600008 2020 18.061640642098 2021 20.4315982300503 2022 20.5505997841542