Year Percent of GDP 1998 16.074 1999 14.813 2000 11.701 2001 9.481 2002 9.108 2003 8.52 2004 8.098 2005 9.14 2006 10.328 2007 10.986 2008 10.547 2009 9.438 2010 8.851 2011 9.509 2012 15.475 2013 20.844 2014 22.462 2015 21.425 2016 19.552 2017 18.275 2018 17.777 2019 17.283 2020 17.383 2021 17.433 2022 17.733 2023 18.133 2024 18.433