Year % of GDP 2011 19.217036556448452 2012 19.314594625365007 2013 18.64462177017028 2014 18.74919142331173 2015 20.045354174931518 2016 20.217452195542037 2017 19.717592709754157 2018 19.290932420154334 2019 20.13128217837254 2020 20.047199783514305 2021 19.72229197615873 2022 20.022448928922888