Year	current US$
2006	48363770000
2007	61517870000
2008	95826680000
2009	74374270000
2010	37215400000
2011	15897550000
2012	17093390000
2013	12735110000
2014	26440980000
2015	14760100000
2016	10080164453.5071
2017	14428816885.201101
2018	14477620000
2019	10704050000
2020	16081080000
2021	20987020000
2022	11224440000