Year % of total employment (modeled ILO estimate) 1991 12.2814902750198 1992 12.3486005185944 1993 12.4207382947493 1994 12.4530898205484 1995 12.5733268430229 1996 12.5699885086033 1997 12.6665088523898 1998 12.8609504310941 1999 12.9576290146059 2000 12.9941082981221 2001 13.0957830270932 2002 13.2911730494824 2003 13.3818127051696 2004 13.5331320246399 2005 13.8628634294912 2006 14.190680508939 2007 14.434960051549 2008 14.7187390917797 2009 15.0241923509026 2010 15.3538636217859 2011 15.6209470120678 2012 18.28924960665 2013 18.7464168530304 2014 19.3593117212243 2015 19.7589179598186 2016 20.1166066983511 2017 20.4853323670062 2018 20.9793574560217 2019 21.4766815748856 2020 21.2916249474427 2021 21.384657372313 2022 21.7369339527641