Year Percent of GDP (Units) 2014 19.442 2015 19.397 2016 19.132 2017 20.851 2018 22.154 2019 22.967 2020 20.811 2021 20.980 2022 22.441 2023 23.000 2024 21.832 2025 20.977 2026 20.788 2027 20.441 2028 20.450 2029 20.142