Year % of total employment (modeled ILO estimate) 1991 21.521363657870566 1992 22.25657970451454 1993 23.46286325692614 1994 24.934633862951163 1995 26.476724401368067 1996 27.53059098563214 1997 28.08927000906396 1998 28.404967006616992 1999 28.58981882672736 2000 29.095123218239316 2001 29.469563859096894 2002 30.21643248456034 2003 30.77652303217385 2004 32.13253320874315 2005 32.70469374262908 2006 33.627459941055506 2007 34.034032117953956 2008 34.800340094160994 2009 35.691587130089175 2010 36.2520216595613 2011 37.14828854801684 2012 37.52045252198715 2013 39.50519605821743 2014 41.20794586162665 2015 42.721936124147675 2016 43.41146189916569 2017 43.84261763137394 2018 44.3777974191282 2019 45.044209426431486 2020 45.41718183227309 2021 45.50922964095219 2022 45.85402463820356