Year % of total employment (modeled ILO estimate) 1991 3.9840043025303413 1992 4.119340190194227 1993 4.20022900473385 1994 4.402438782460337 1995 4.546302685745159 1996 4.449629347349351 1997 4.016517822253158 1998 6.7143770235862466 1999 7.538417927441603 2000 7.779464157486344 2001 8.170929947463081 2002 8.423754002091995 2003 8.932598025779619 2004 9.521570589887734 2005 9.877546215058699 2006 10.288235488315733 2007 10.828866248317668 2008 11.093705461914618 2009 11.911162824620556 2010 12.411120144307496 2011 12.43451283843559 2012 12.447348220067488 2013 12.448493841561733 2014 12.040647505017981 2015 12.039148875127283 2016 12.247022705442802 2017 12.091968228668845 2018 11.91470946592334 2019 12.07109398703414 2020 12.071718345946751 2021 12.078291836997105 2022 12.33884115363671