Year % of total employment (modeled ILO estimate) 1991 23.3019913597621 1992 24.1343239160686 1993 24.9761339830965 1994 25.8001589515818 1995 26.6429819292237 1996 27.4982214519316 1997 27.920556326165 1998 28.3505133801267 1999 28.7358974298402 2000 29.1089603046059 2001 30.8744353191137 2002 32.7239102349445 2003 34.5839740220447 2004 35.9668365972171 2005 37.4060293368121 2006 37.4046387253834 2007 36.8535170301493 2008 36.273984767609 2009 35.6815492048993 2010 35.066392616015 2011 34.802300150612 2012 34.4796536610049 2013 34.1119310424109 2014 35.073689459478 2015 35.9872057930085 2016 36.8757266911524 2017 38.9833724424852 2018 39.8230499326238 2019 40.5065282721841 2020 40.4593427201977 2021 40.6594675212071 2022 41.2628288253737