Year % of GDP 2000 4.20303917 2001 4.36767626 2002 4.39886856 2003 4.0944252 2004 3.43877316 2005 4.39218235 2006 3.93785167 2007 4.48511505 2008 5.13681602 2009 6.18757915 2010 5.45029831 2011 5.49565887 2012 5.03539467 2013 4.41074276 2014 4.64796257 2015 3.99459696 2016 3.1935668 2017 3.18527389 2018 3.00017619 2019 3.00427818 2020 2.74805593 2021 2.59331965