Year % of total employment (modeled ILO estimate) 1991 35.18163894477255 1992 35.576486300290995 1993 36.30977979366346 1994 36.98141043342267 1995 37.752640226260425 1996 38.34586520782866 1997 38.72662140303705 1998 39.00997477632034 1999 39.195969008696785 2000 39.569898523553626 2001 40.076392916642014 2002 40.74150894919117 2003 41.29077259846118 2004 42.129167385151185 2005 42.70968084797816 2006 43.20511753465289 2007 43.48998444125157 2008 43.921452022692016 2009 44.41328843499025 2010 44.66765336474845 2011 45.234027705081935 2012 45.66147928301 2013 46.53569558897364 2014 47.39632867190243 2015 48.227191618328796 2016 48.705192905418116 2017 49.12920220852401 2018 49.630627080298886 2019 50.0900635184127 2020 49.54006410566087 2021 49.58617007764452 2022 49.74479703308712