Year % of GDP 2011 72.43331647551592 2012 72.46315710057962 2013 73.46704796888646 2014 70.21452507163232 2015 71.2444353893903 2016 66.46687035304576 2017 66.53073517584704 2018 65.6642066504524 2019 68.68231211286366 2020 70.0432684287148 2021 72.22051755530492 2022 77.40362821919388 2023 78.909595946394