Year Percent of GDP (Units) 2014 2.546 2015 7.137 2016 9.728 2017 15.427 2018 23.056 2019 27.937 2020 18.375 2021 27.222 2022 22.938 2023 23.145 2024 26.169 2025 26.129 2026 26.156 2027 26.114 2028 25.900 2029 25.759