Year % of GDP 2000 3.47014546 2001 3.51298475 2002 3.6863513 2003 3.50954437 2004 3.46692538 2005 3.34525228 2006 3.54130626 2007 3.48462701 2008 3.50441861 2009 3.70742011 2010 3.57701325 2011 3.46567941 2012 3.35463309 2013 3.55113959 2014 3.69886327 2015 3.85384846 2016 3.94843698 2017 3.95314622 2018 3.88923812 2019 3.91701889 2020 4.52904463 2021 4.50447893