Year % of total employment (modeled ILO estimate) 1991 20.477366552313555 1992 20.893859399482757 1993 21.23032807532379 1994 21.474467082869637 1995 22.28479134416222 1996 21.90688436009423 1997 22.795129986244547 1998 22.71400963748568 1999 23.33549676678123 2000 23.83407575006626 2001 23.848290868210675 2002 21.865417819687508 2003 21.43301980428822 2004 20.055147339000754 2005 19.603809124377513 2006 18.609992541337018 2007 18.014432037439818 2008 17.469503302408743 2009 17.692760107436506 2010 18.447959597997407 2011 17.997334815144917 2012 17.825901252329384 2013 17.318632419422233 2014 16.977707152528684 2015 16.21943787358364 2016 15.444119484677678 2017 15.116895335415947 2018 14.821157103417288 2019 14.455038802051849 2020 14.805464591630477 2021 14.1877445280995 2022 14.340974332290033