Year % of GDP 2004 0.004565272939659372 2005 0.006405990844883472 2006 0.000900832124589662 2007 0.014005974512876685 2008 0.22615309502788333 2009 1.5847801678848032 2010 1.697669015756219 2011 2.033399844968913 2012 1.9900067085420698 2013 1.9839836154501078 2014 2.079345778069576 2015 1.644363046049693 2016 1.182688705263937 2017 1.2382699399653447 2018 1.811973392304595 2019 1.875733655899936 2020 1.8239420235989827 2021 1.7410712031706521 2022 1.4475185355048694 2023 1.8291322725563097