Year % of GDP 2003 66.84210526315789 2004 68.14639298866653 2005 63.39178477059812 2006 63.385139450713226 2007 61.80550334561311 2008 64.7448046550291 2009 63.917827641474545 2010 64.46914262046114 2011 62.01611415216188 2012 62.794379122454835 2013 61.82813448492529 2014 63.87419672497284 2015 63.44948172763893 2016 62.77589288971581 2017 60.428886895314335 2018 59.292758677055524 2019 59.71739458969322 2020 62.91194420226678 2021 63.8131532032515 2022 61.72531214528944