Year % of total employment (modeled ILO estimate) 1991 17.488320040273297 1992 17.471413668998753 1993 17.470375361442002 1994 17.476588332059123 1995 17.505300165987904 1996 17.636963040685462 1997 17.809979946146445 1998 17.99582100410015 1999 18.22509144661622 2000 18.452262851059036 2001 18.646220345645816 2002 18.450119443950324 2003 18.315547814200393 2004 18.42673202706239 2005 18.578154004641725 2006 18.753162762800493 2007 19.02634843262626 2008 19.424733800274055 2009 19.77283239968171 2010 20.079873164419933 2011 20.426829645595806 2012 20.849378055380456 2013 21.04314930359613 2014 21.18376744593309 2015 21.27289952973776 2016 21.308970511193877 2017 21.078858546990425 2018 21.12846984395063 2019 21.07342987379423 2020 20.70171101609617 2021 20.93612093484997 2022 21.20857522054859