Year current US$ 2010 12964165850.201162 2011 15485444483.304874 2012 16477842752.511024 2013 18052005558.128765 2014 18119090170.593014 2015 13904069902.192554 2016 14143422430.849207 2017 15705805095.876019 2018 15175621200.816612 2019 13969635376.260666 2020 9431237619.652277 2021 10501992483.24811 2022 14560745758.813206