Year % of total employment (modeled ILO estimate) 1991 20.3004104243075 1992 20.297883605763282 1993 20.429970705409815 1994 20.563562052740707 1995 20.747189742844625 1996 21.04257435007152 1997 21.27525234604754 1998 21.54535907561316 1999 21.846426000214546 2000 22.049136855569405 2001 22.116640062783027 2002 22.340447686715024 2003 22.700579226132053 2004 23.007295874854094 2005 23.287799504826936 2006 23.90093260764614 2007 24.567025325727894 2008 25.25929032208794 2009 25.892079338331552 2010 26.76697744991065 2011 27.450643984799477 2012 28.187707025176955 2013 28.410770025905883 2014 29.310887069968505 2015 30.04982245209225 2016 30.485665637686555 2017 30.96138965861946 2018 31.614838811853275 2019 32.17460236113351 2020 31.947984659131794 2021 32.17298916047814 2022 32.59575651387857