Year Percent of GDP (Units) 2014 2.587 2015 4.950 2016 12.204 2017 23.474 2018 37.545 2019 34.641 2020 34.193 2021 45.648 2022 39.151 2023 36.659 2024 37.245 2025 36.683 2026 36.155 2027 35.778 2028 35.398 2029 35.024