Year current US$ 2010 6370159959.653666 2011 7195094689.976647 2012 9047114643.269989 2013 9238375991.809042 2014 8767368898.253677 2015 7161705766.034449 2016 6379773279.980795 2017 9379818323.968775 2018 11005006637.243862 2019 9256895982.15879 2020 8418769000.942195 2021 9974041247.65938 2022 13237847967.90492