Year % of total employment (modeled ILO estimate) 1991 14.944194793502897 1992 14.930061995722557 1993 14.946189588083028 1994 15.02219502481361 1995 15.124435206209261 1996 15.279761133537567 1997 15.389295541029496 1998 15.61058694179104 1999 15.976766211173304 2000 16.140853369735833 2001 16.518032371396927 2002 16.805463094877226 2003 17.347047255055227 2004 17.766971503835087 2005 18.201507965549887 2006 18.718083424421835 2007 19.440805563598236 2008 19.911191277341445 2009 20.785203646469594 2010 21.67753086848012 2011 22.688417444403775 2012 23.757416834088165 2013 24.012059280809186 2014 24.118354161366057 2015 24.2823003623957 2016 24.37394807969436 2017 24.4984550865107 2018 24.680763133620264 2019 24.57829206303546 2020 23.47366231031644 2021 24.17111500826703 2022 25.448535934514133