Year % of GDP 2005 0.07438682398173566 2006 0.08856965864360457 2007 0.052577894727008 2008 0.07428551137677647 2009 0.10456676551523915 2010 0.07280071910116818 2011 4.363432443948089 2012 2.9203791147575813 2013 3.0641556101561664 2014 2.1064622394182964 2015 3.0765790605334784 2016 1.598178123829527 2017 2.8309198518998246 2018 3.8317737316245633 2019 4.010206949365371 2020 2.4550956554041097 2021 2.4361404170734726 2022 2.0484009571256747 2023 2.050425940278162