Year % of total employment (modeled ILO estimate) 1991 2.8268879702335 1992 2.85815816046076 1993 2.89331314701004 1994 2.9366758206323 1995 2.97646881157764 1996 3.02746976958279 1997 3.08677165210839 1998 3.15233493696354 1999 3.22702871614056 2000 3.28991488796705 2001 3.36731308030464 2002 3.39697030257389 2003 3.44585257893065 2004 3.37596644954096 2005 3.30126669828405 2006 3.22705595203171 2007 3.1430568150511 2008 3.05853563521273 2009 2.9656117374878 2010 2.86926601364651 2011 2.76780192843756 2012 2.66923980289841 2013 2.5655696722947 2014 2.47049436568986 2015 2.37873075186832 2016 2.36137374721614 2017 2.35233471559527 2018 2.34236088925231 2019 2.33205224548665 2020 2.31799351516307 2021 2.30930921814947 2022 2.29696740625449