Year Percent of GDP 2002 17.592 2003 14.962 2004 11.392 2005 8.099 2006 6.667 2007 5.874 2008 6.766 2009 10.227 2010 10.683 2011 10.161 2012 12.125 2013 12.603 2014 14.496 2015 21.882 2016 19.677 2017 20.347 2018 21.879 2019 20.896 2020 20 2021 19.228 2022 18.524 2023 17.65 2024 16.805