Year % of total employment (modeled ILO estimate) 1991 28.282969325856882 1992 28.94048592126813 1993 30.178791506740254 1994 31.502665963901205 1995 32.850570359495876 1996 33.81530939671942 1997 34.26824899922775 1998 34.5858140735181 1999 34.774145508918195 2000 35.31535859220296 2001 35.77822975081482 2002 36.462901038670715 2003 37.07497830482841 2004 38.28962382558989 2005 38.89155238973799 2006 39.82700632844038 2007 40.21750502064825 2008 41.04310042225074 2009 41.96295111434228 2010 42.5385469093224 2011 43.33973977551644 2012 43.7598865053816 2013 45.47780529942489 2014 46.985221613653216 2015 48.30254925120598 2016 48.92918293291856 2017 49.31767635194306 2018 49.80380727401135 2019 50.46905791218715 2020 50.394157360373505 2021 50.49131847833226 2022 51.00672749836269