Year % of GDP 2005 27.20456105142004 2006 28.44257723809277 2007 28.858170332526424 2008 28.984936060307508 2009 25.65221443665093 2010 28.627718173629596 2011 28.399997021116352 2012 27.104186415731316 2013 25.682321217491285 2014 25.34787303212524 2015 22.94473295159663 2016 23.517501907795136 2017 24.836736363006064 2018 24.860622582959877 2019 26.980922795916687 2020 25.63846067479501 2021 27.62822481924965 2022 27.411445419727396