Year % of total employment (modeled ILO estimate) 1991 21.18684621674597 1992 21.422503562269974 1993 21.909431978331472 1994 22.1327795951295 1995 22.395792032896786 1996 22.76334075871744 1997 22.905767757635427 1998 22.421372282752117 1999 22.058407426880805 2000 21.72449334901047 2001 21.678822237704544 2002 21.06108213397388 2003 21.152062804734847 2004 21.74693258579357 2005 22.696584938807074 2006 23.667256839592905 2007 24.687939433640473 2008 24.88365624489126 2009 25.129293542074688 2010 25.690694352291708 2011 26.22333688556239 2012 26.802855892776034 2013 26.7159120368975 2014 26.735861233467777 2015 26.476350120522927 2016 26.776001476427616 2017 27.074665500237483 2018 27.42948302919496 2019 27.730438812329286 2020 28.08623623189594 2021 28.567622045142354 2022 28.42229205106359