Year Percent of GDP (Units) 2011 20.847 2012 31.618 2013 25.336 2014 36.217 2015 33.159 2016 53.817 2017 63.960 2018 48.593 2019 47.926 2020 34.100 2021 44.114 2022 27.555 2023 25.769 2024 27.314 2025 27.914 2026 26.309 2027 25.531 2028 24.777 2029 23.349