Year % of total employment (modeled ILO estimate) 1991 19.3297807806092 1992 20.8004990875781 1993 20.6640204723402 1994 20.9598237025609 1995 22.4868274529231 1996 21.9266551983715 1997 22.0727516459046 1998 22.640836985388 1999 22.5430077785231 2000 22.2671102358066 2001 21.9539125538066 2002 21.7796340911024 2003 21.4579634389961 2004 20.8043226954148 2005 20.4458997168106 2006 18.7501918171722 2007 17.7979668591489 2008 16.9445729144678 2009 16.8372796994472 2010 16.5504759648837 2011 16.195029642259 2012 15.9409683691318 2013 15.7042783292388 2014 14.7726194772335 2015 15.257369375824 2016 15.5994068130811 2017 15.4081346133468 2018 15.281262785944 2019 15.1969196896938 2020 15.2704370126983 2021 15.0966584702884