Year current US$ 2013 24409045.63895094 2014 27183056.588698015 2015 25674491.478215855 2016 25934614.367463607 2017 35754458.95532886 2018 41275374.88535401 2019 46930535.50227604 2020 53478990.102463976 2021 62276463.67058479 2022 66880924.59529262 2023 72136013.75189202