Year % of total employment (modeled ILO estimate) 1991 17.7291960786542 1992 17.5984963057865 1993 17.8128791257726 1994 18.4838167955158 1995 18.8216400586292 1996 18.9716313300727 1997 19.3549648989499 1998 19.4503294160992 1999 19.58296260222 2000 19.6887701890407 2001 19.6302527585132 2002 19.8764724744733 2003 20.3689371970509 2004 20.9864458631715 2005 21.4949586845226 2006 22.0103805957608 2007 22.886500010305 2008 23.602994140862 2009 24.3649292829175 2010 25.0393488025275 2011 25.5621613045245 2012 25.9339394861557 2013 26.5089902469961 2014 27.0321997730433 2015 27.5229750292536 2016 27.966252198643 2017 28.4794619219089 2018 29.0443842328519 2019 29.4894701826654 2020 29.2313304950389 2021 29.3454695515255 2022 29.7706669549503