Year Percent of GDP (Units) 2014 23.598 2015 24.325 2016 24.688 2017 24.089 2018 23.644 2019 25.569 2020 28.243 2021 33.715 2022 37.043 2023 37.378 2024 36.603 2025 28.731 2026 24.016 2027 23.905 2028 23.876 2029 23.866