Year % of GDP 2004 2.120142907800192 2005 0.8732133241439615 2006 1.245770074073773 2007 2.054769280274998 2008 1.927001537598106 2009 13.735912722005086 2010 3.6041768998099446 2011 2.8263619090640164 2012 2.807737233240528 2013 3.143893728694258 2014 1.734749002837515 2015 6.281278217654686 2016 8.079014019811561 2017 5.009026167755472 2018 3.4755631917044463 2019 3.572808905260276 2020 5.721786777423507 2021 8.450723358084979 2022 3.7428807365532566