Year % of total employment (modeled ILO estimate) 1991 4.2903438867349 1992 4.37435630112513 1993 4.44964492363622 1994 4.1919969544987 1995 4.45649777700754 1996 4.84787902585821 1997 5.45130958395905 1998 6.11559943770537 1999 7.26554522988591 2000 8.53602555914231 2001 11.0009592115105 2002 11.503572935945 2003 11.9938504794042 2004 12.6467295661227 2005 13.2438561296621 2006 13.9957533996149 2007 14.7203926520515 2008 15.6742797523399 2009 15.6234920907206 2010 15.9732713512723 2011 16.4718060518903 2012 17.7456014729801 2013 19.2826832673686 2014 23.7681159024168 2015 24.9213854498728 2016 25.7634186337438 2017 25.4908926881055 2018 24.944931100147 2019 24.4731370613359 2020 25.1450538094569 2021 26.4143960537374 2022 26.5674926215365