Year % of GDP 2010 15.655822203544822 2012 15.850354464031712 2013 14.978185660651329 2014 15.115522683259824 2015 14.910590329510336 2016 14.92762238324435 2017 15.262395716263331 2018 14.319905251559316 2020 15.778209220272505