Year constant 2015 US$ 2013 261777674.16558754 2014 311898753.07574403 2015 327416700.0846243 2016 397047091.8483874 2017 507386218.03162426 2018 509992654.0840381 2019 509992654.0840381 2020 560383751.0779454 2021 612512472.1100333 2022 659428321.0372933 2023 680647925.1020317