Year % of GDP 2000 18.54950522994947 2001 17.895003550190133 2002 16.94302017549178 2003 15.759916408477945 2004 16.276792695260866 2005 16.165278134681266 2006 16.065228431354154 2007 15.468782170822845 2008 16.7454076078181 2009 15.570041080567115 2010 14.889846544794223 2011 15.085578694507415 2012 14.499130304114699 2013 13.699590868518252 2014 13.854888258930323 2015 15.261120174434236 2016 15.165032956445208 2017 15.17369331435705 2018 15.682942851914783 2019 15.854165509797355 2020 10.911923121079028 2021 9.296285851038098 2022 11.6456553353089 2023 13.79082779651362