Year % of GDP 2015 25.82784288545264 2016 21.614694131241816 2017 17.52261232369387 2018 15.328438847717058 2019 15.850531387350836 2020 14.150627870857116 2021 10.687563605900815 2022 8.817410829910056 2023 10.109331606286945