Year current US$ 2012 377896.219491959 2013 390152.543783188 2014 304159.998893738 2015 321709.990501404 2016 318650.00724792504 2017 449220.00169754 2018 574735.641479492 2019 1791599.98893738 2020 562887.728214264 2021 317400.008440018 2022 523808.12168121303