Year % of GDP 2010 13.769425845491657 2012 14.247218709853632 2013 13.846989054986238 2014 13.958855377184165 2015 13.665489019056015 2016 13.125466050346096 2017 13.770750199189324 2018 14.058834120316893 2020 13.735441752353367