Year % of GDP 2000 0.004827600617340383 2001 0.02416856790888892 2002 1.3069498704288407 2003 1.2784932519642351 2004 3.5771042005840017 2005 4.368673104342874 2006 3.4137729732320112 2007 1.935701713916356 2008 0.45536044478174004 2009 0.4518891456218896 2010 1.2031179898113904 2011 0.29302517961680297 2012 0.28544089355457103 2013 0.2398011844055509 2014 0.20966479467220256 2015 0.88400046336123 2016 0.5166060845230934 2017 0.2747967915728065 2018 0.6615722177871963 2019 0.12449598529125788 2020 0.06499395718087549 2021 0.14440105718478355