Year Purchasing power parity; 2017 international dollar (Units) 2011 1056.005 2012 506.719 2013 624.185 2014 614.464 2015 594.925 2016 501.106 2017 458.770 2018 435.412 2019 425.937 2020 386.677 2021 395.805 2022 364.704 2023 354.176 2024 363.479 2025 377.242 2026 385.815 2027 394.950 2028 405.432 2029 416.725