Year % of GDP 2000 3.36023808 2001 2.57100463 2002 2.43640971 2003 2.70172191 2004 2.57289863 2005 2.79434443 2006 2.69501734 2007 2.52050734 2008 2.61492229 2009 2.67258692 2010 2.95949578 2011 3.15106702 2012 3.48056149 2013 3.28141499 2014 3.21116447 2015 3.25268769 2016 3.33051729 2017 3.76958227 2018 4.10668468 2019 3.33201027 2020 3.79538107 2021 4.1700511