Year	current US$
2006	8114208525.93961
2007	615894074.121936
2008	-10467839722.3718
2009	-26087759636.1625
2010	-21844084058.0444
2011	-31233095467.7163
2012	-20250942747.67
2013	-13375193103.2251
2014	-10675168215.3732
2015	-8273713063.38571
2016	-7046409671.41685
2017	-8897811638.91883
2018	-8085852861.84346
2019	-5585471956.41812
2020	-13249470435.1392
2021	-4630730755.94789