Year Percent of GDP 2001 78.336 2002 72.71 2003 66.319 2004 59.465 2005 54.413 2006 48.496 2007 46.953 2008 52.685 2009 54.486 2010 56.549 2011 55.845 2012 59.22 2013 60.13 2014 58.034 2015 58.244 2016 61.259 2017 61.414 2018 67.202 2019 72.692 2020 75.348 2021 77.66 2022 79.649 2023 81.446 2024 83.225