Year % of GDP 2005 14.85247076100091 2006 15.143088850807032 2007 20.26446574014612 2008 16.68508530155126 2009 15.89726192731053 2010 17.30392191432875 2011 17.46663986227898 2012 17.308964244337822 2013 16.964866389323966 2014 19.70805828261943 2015 19.679941253517462 2016 19.439018698507468 2017 19.32133437019402 2018 20.162504149975657 2019 20.035235687760366 2020 18.313601145266627 2021 18.838302334748374 2022 19.308512063263493