Year % of total employment (modeled ILO estimate) 1991 20.230987509252298 1992 20.103770369377816 1993 20.194553641281022 1994 20.379840918280326 1995 20.543059473126707 1996 20.797770474194515 1997 20.937933012502903 1998 21.131779675773934 1999 21.43249479028151 2000 21.53511436832237 2001 21.731003222401082 2002 21.941434733179626 2003 22.27330315319504 2004 22.551322557344868 2005 22.768801223206754 2006 23.354497263594315 2007 23.864128650292848 2008 24.320606988339797 2009 24.780022434581323 2010 25.552193960968914 2011 26.428058093488396 2012 27.121644887962447 2013 27.09264633943638 2014 27.800666063468324 2015 28.313135003692885 2016 28.890659513730345 2017 29.5588234022447 2018 30.17941023751463 2019 30.808676521688984 2020 30.62074972165767 2021 30.95483319040324 2022 31.410369668790153