Year % of GDP 2000 3.94314837 2001 3.83341885 2002 4.00326157 2003 3.88919258 2004 4.01650906 2005 4.2482481 2006 4.52057076 2007 4.1049161 2008 4.0889926 2009 4.10507488 2010 4.37232924 2011 4.79892349 2012 4.45448637 2013 4.76325369 2014 4.68769121 2015 4.80888462 2016 4.84736443 2017 4.58291912 2018 4.54387665 2019 4.71487188 2020 5.88103342 2021 6.40300608