Year % of GDP 2002 18.383634723666045 2003 17.648231715449235 2004 12.578779694764322 2005 22.70467311178677 2006 37.053558686890035 2007 16.930175709700347 2008 22.748690945681975 2009 13.995877008497473 2010 11.77606733806844 2011 15.150247067903411 2012 11.487031421735347 2013 11.849553499010577 2014 16.215241235124775 2015 41.670010227137915 2016 32.30531104785656 2017 30.51056144729091 2018 34.585225613762404 2019 36.456701152395866 2020 36.06481860164264 2021 40.42973533013791 2022 50.23166675604759