Year % of total employment (modeled ILO estimate) 1991 21.69845850616435 1992 21.77126464445147 1993 22.057858176866194 1994 22.10798783940337 1995 22.542447855354883 1996 23.0999291510021 1997 23.365288281546636 1998 23.565761518155178 1999 23.894261114688852 2000 24.1361964898592 2001 24.67708686779944 2002 25.27291498290986 2003 25.95752629787543 2004 26.476248403008043 2005 26.993834933281036 2006 27.45991615190388 2007 27.851544431732872 2008 28.170320109983177 2009 28.46353182629366 2010 29.124406897012328 2011 29.571720188437787 2012 29.956384653011632 2013 30.072600944593034 2014 30.824652951441745 2015 31.512666260134985 2016 32.10154011880557 2017 32.83409734227979 2018 33.48963056314707 2019 33.95708915723368 2020 33.860204634018885 2021 34.01379437465066 2022 34.44369308371365