Year % of total employment (modeled ILO estimate) 1991 16.8481063113204 1992 16.851926090601 1993 16.8155715014601 1994 16.8342719227675 1995 16.7825142063167 1996 16.8348793409959 1997 16.9629799061501 1998 17.1796921506931 1999 17.8535787594079 2000 18.3160180686728 2001 18.9898924661737 2002 19.5263350693615 2003 20.2309978074997 2004 20.7972678560914 2005 20.8526994594561 2006 19.9031970220015 2007 18.8928527709284 2008 18.1319818249332 2009 17.2844252908537 2010 16.6994387333416 2011 16.0790113024189 2012 15.4390520670979 2013 15.0534081848862 2014 14.7910236321281 2015 14.5142885979988 2016 14.1737938053973 2017 14.2389650138776 2018 14.2547530874636 2019 14.076667387841 2020 14.0380277524891 2021 14.2245621934921 2022 14.236830281312