Year current US$ 2011 24399999.6185303 2012 45169998.1689453 2013 55209999.0844727 2014 54799999.237060495 2015 42080001.8310547 2016 48680000.3051758 2017 55209999.0844727 2018 70400001.5258789 2019 47279998.779296905 2020 37380001.0681152 2021 33080001.831054702 2022 33290000.915527303