Year	current US$
2002	-3153027145.03655
2003	-5925317584.25149
2004	-1459227976.73552
2005	-1391639452.88595
2006	-1306125448.20456
2007	-155276454.788932
2008	-2205259750.97281
2009	-2740323806.06402
2010	-4386163385.4896
2011	-6352672857.23994
2012	-9359745174.94792
2013	-9617412929.358
2014	-10469799032.7473
2015	-7752921526.48605
2016	-7714545040.50467
2017	-9708851975.45386
2018	-12120049380.1531
2019	-13330842307.8262
2020	-6161681763.93236
2021	-6205049882.43076