Year % of GDP 2000 4.052643048375765 2001 4.399380924694845 2002 4.268389791128652 2003 4.991529874458203 2004 4.770587618991787 2005 4.523559393824909 2006 4.45658642968786 2007 4.424366684396566 2008 4.119867530605569 2009 4.4645345995027075 2010 4.224717499232826 2011 4.135759706849355 2012 4.164794150464757 2013 4.284649984396914 2014 4.224999514910778 2015 4.452833085453758 2016 4.7798318629782095 2017 4.744270210035635 2018 4.443085524158491 2019 4.379815292340886 2020 4.867284127929687 2021 5.1647099391367455