Year Percent of GDP 2000 16.849 2001 16.317 2002 16.404 2003 15.031 2004 13.965 2005 16.798 2006 43.949 2007 18.523 2008 18.722 2009 15.677 2010 14.983 2011 16.255 2012 16.326 2013 16.317 2014 16.612 2015 16.479 2016 14.816 2017 14.954 2018 15.782 2019 15.825 2020 15.863 2021 15.838 2022 15.857 2023 15.858 2024 15.925