Year % of GDP 2003 65.21531659622538 2004 65.31546795863976 2005 63.72790293065058 2006 63.89759010984422 2007 65.41850040417071 2008 63.576569576239926 2009 67.28994013035657 2010 65.62011649382015 2011 64.45972481456553 2012 61.64786822346443 2013 63.903975596007825 2014 63.55526299291581 2015 62.93580273346894 2016 60.431745474299944 2017 60.54681898570814 2018 59.3606998305357 2019 60.53405634704659 2020 60.43473302691794 2021 62.74657268272061