Year current US$ 2012 331402.391195297 2013 513066.530227661 2014 851840.019226074 2015 666270.017623901 2016 824819.982051849 2017 662769.973278046 2018 567272.663116455 2019 4404160.0227356 2020 1948585.74867249 2021 910399.973392487 2022 1749680.16147614