Year current US$ 2010 5956328387.129185 2011 5440020313.623432 2012 4871681658.148265 2013 5208441911.987392 2014 5590491866.9240465 2015 6842798704.693077 2016 7777997513.931476 2017 8684038683.258236 2018 8234002160.430276 2019 6949299399.68925 2020 4788869276.037946 2021 4768656645.081637 2022 3469658352.195313 2023 5230570589.659488