Year constant 2015 US$ 2015 54443169605.215454 2016 56011362972.0116 2017 55672439995.01152 2018 58307456192.53104 2019 60537734408.848236 2020 57048433008.33724 2021 58586426146.75045 2022 58316649665.07815 2023 52426991860.18625