Year Percent of GDP (Units) 2013 2.001 2014 2.310 2015 1.822 2016 1.854 2017 2.880 2018 3.234 2019 3.338 2020 5.130 2021 4.677 2022 6.906 2023 6.297 2024 7.526 2025 7.173 2026 6.725 2027 6.448 2028 6.390 2029 6.597