Year % of GDP 2000 3.3991127 2001 3.19861364 2002 3.7554152 2003 4.27386999 2004 3.53825521 2005 3.80623102 2006 4.22306824 2007 4.05582809 2008 3.61543369 2009 3.64194465 2010 3.35966682 2011 3.37655354 2012 3.299927 2013 2.92013574 2014 2.96726322 2015 3.3475771 2016 2.7416594 2017 2.46857476 2018 2.33968735 2019 2.16640544 2020 2.15048313 2021 2.87667227