Year % of GDP 1994 27.67248157511796 1995 20.42189097729051 1998 26.274665793084992 1999 24.902059099040446 2000 25.400846534506112 2001 26.491376245069166 2002 26.20347794032142 2003 26.750203845518847 2004 25.57597157924602 2007 27.29071387735051 2008 27.415456714876512 2009 33.99059410018539 2010 30.348407692158155 2011 27.167899468362844 2012 27.513763023140548 2013 27.65955749879959 2014 28.716160318369496 2015 30.077939765916817 2016 30.593633566242758 2017 30.7062583216566 2018 29.97920473756922 2019 30.99966010673066 2020 34.764071535356955 2021 31.376300009101755 2022 32.962230101884735