Year % of total employment (modeled ILO estimate) 1991 30.41941085263802 1992 30.439940826162914 1993 30.388011303801147 1994 30.511456416171807 1995 30.508890688146117 1996 30.676839568116126 1997 31.055595957682606 1998 30.792836291963344 1999 30.873929086156355 2000 30.99403085098113 2001 31.307797052044368 2002 31.610630332475708 2003 31.674665785644695 2004 32.22186568713437 2005 33.06789164447963 2006 33.44107913563099 2007 33.720641331493816 2008 33.96740974509004 2009 34.051161060895275 2010 34.446886234821505 2011 35.483096073423546 2012 36.71017208340129 2013 37.5115482380072 2014 38.15141917549968 2015 39.05373893019632 2016 40.7388022556318 2017 40.3523228977771 2018 40.82474594301665 2019 40.884795335161385 2020 39.25959145406688 2021 39.63087882389102 2022 39.66464791352778