Year Percent of GDP 1997 56.076 1998 51.461 1999 50.573 2000 57.846 2001 61.797 2002 57.586 2003 53.907 2004 54.606 2005 83.918 2006 59.708 2007 65.595 2008 60.7 2009 61.576 2010 56.668 2011 54.883 2012 51.53 2013 53.307 2014 49.435 2015 56.979 2016 57.903 2017 65.53 2018 65.473 2019 66.479 2020 67.329 2021 67.38 2022 67.578 2023 67.833 2024 67.47