Year % of total employment (modeled ILO estimate) 1991 31.343656143654375 1992 31.81112082751608 1993 32.524207167857064 1994 33.212221387261145 1995 33.952657612101035 1996 34.73138157204632 1997 35.56744625210506 1998 35.92693244302063 1999 36.44183395477952 2000 37.02991393956998 2001 38.08210623879987 2002 38.71218056580258 2003 39.36603509940366 2004 40.60236022777834 2005 41.59993177820082 2006 42.50855515943954 2007 43.28756319270899 2008 44.258082678046044 2009 45.11434969051139 2010 46.026542040193874 2011 47.02529775625229 2012 47.93537454702049 2013 48.64537346322666 2014 49.385575996379636 2015 50.27802964989046 2016 50.85406348728993 2017 51.2674588532062 2018 51.85098348879191 2019 52.39117539713916 2020 52.064006017855064 2021 52.422033878973 2022 52.75342348690707