Year % of GDP 2002 9.302869566977062 2003 12.565436699480118 2004 14.948198701369417 2005 16.86114881627108 2006 22.01313940912188 2007 26.47670800084157 2008 29.707192025085906 2009 36.91588193652882 2010 33.453007260497195 2011 30.927260299082636 2012 35.064862280546805 2013 35.83467142509347 2014 41.43747582511292 2015 40.26174014175983 2016 44.40737970028749 2017 51.48865442078767 2018 54.18272077221877 2019 38.88754159116187 2020 40.318114630544756 2021 30.883170013836992 2022 37.90713169130913 2023 55.624658158062424