Year % of total employment (modeled ILO estimate) 1991 15.7181585856895 1992 15.3979698080928 1993 15.8293767883521 1994 16.1338497618839 1995 16.332563995928 1996 16.8096918232932 1997 16.8517375035432 1998 16.8035197988686 1999 17.1329720440017 2000 16.7241318175296 2001 16.4322211042999 2002 15.8901879069676 2003 15.0332870089508 2004 14.8952315589613 2005 14.5172703969657 2006 15.136666879192 2007 15.8529196260665 2008 16.4739213881051 2009 17.1174363696521 2010 18.2176263939356 2011 19.1581424461228 2012 19.662373096013 2013 20.5578356709429 2014 21.8238889953555 2015 23.1248356238558 2016 24.2308306635236 2017 25.5769805725492 2018 26.7370760538023 2019 28.0497630285203 2020 28.8967196409757 2021 30.2267001931068 2022 30.6852248019249