Year % of GDP 2000 100.8682246587641 2001 101.08004755764024 2002 97.6009918421081 2003 97.78669699075353 2004 94.11546868160829 2005 92.77281064300483 2006 88.59508050938358 2007 85.99591271163995 2008 85.21146025716914 2009 84.41877282323667 2010 83.76334911818444 2011 83.22964865357983 2012 84.78855186812157 2013 83.65152053004408 2014 82.89427041217517 2015 79.30582173462433 2016 77.335006767695 2017 75.50088707801692 2018 73.35580908125888 2019 72.33791680558707 2020 71.93098103410732 2021 68.11694235168075 2022 67.45356618267138 2023 71.88692514331649