Year current US$ 2013 1594341692.8781629 2014 1766532936.4565809 2015 1975073574.872975 2016 2177951183.0340815 2017 2324392714.9858484 2018 2458149179.8943286 2019 2632382271.0878286 2020 2883924059.0588617 2021 3179043435.497212 2022 3071617872.958176 2023 3076299368.11069