Year current US$ 2012 75226.3367176056 2013 79850.4427075386 2014 83669.9977517128 2015 252119.988203049 2016 265700.01244545 2017 134790.003299713 2018 593499.600887299 2019 442380.011081696 2020 616230.309009552 2021 595000.028610229 2022 516769.17076110793