Year % of GDP 2000 3.42441177 2001 2.90547299 2002 2.98349524 2003 2.97298193 2004 3.25768542 2005 3.25656676 2006 3.34798193 2007 3.41514993 2008 3.18467116 2009 3.53587627 2010 3.41664124 2011 3.14293504 2012 3.2655499 2013 3.20040679 2014 3.36860466 2015 3.32468939 2016 3.27979708 2017 3.18689561 2018 4.10572624 2019 4.25136137 2020 4.76918268 2021 5.38085365