Year % of total employment (modeled ILO estimate) 1991 0.148151704877374 1992 0.149588526968592 1993 0.146542163034703 1994 0.159170196461719 1995 0.172020081268999 1996 0.134776521576863 1997 0.262178175303582 1998 0.505409939604373 1999 0.969031138826249 2000 1.10681373485773 2001 1.29334414598908 2002 1.86598884036029 2003 1.56621154365378 2004 0.557260891854702 2005 0.499516429721552 2006 0.415813878192898 2007 0.379035148701564 2008 0.345933540556024 2009 0.407597696320406 2010 0.431265143776432 2011 0.386240200282367 2012 0.343908877336891 2013 0.337188890222458 2014 0.289379205334031 2015 0.24630038358878 2016 0.248816413500629 2017 0.230654570887291 2018 0.211902084178821 2019 0.198742373812088 2020 0.194299061443411 2021 0.187664777974286