Year Percent of GDP 1998 110.004 1999 105.559 2000 100.081 2001 97.949 2002 95.25 2003 92.38 2004 87.856 2005 85.951 2006 82.664 2007 78.426 2008 81.653 2009 88.284 2010 88.392 2011 90.799 2012 91.602 2013 92.49 2014 94.124 2015 93.271 2016 92.396 2017 90.119 2018 88.463 2019 87.027 2020 85.88 2021 84.644 2022 83.324 2023 82.026 2024 80.318