Year	current US$
1995	-2838179350.25763
1996	-2319598843.39034
1997	-2250658468.91265
1999	-2953818860.39906
2000	-4057253725.71836
2001	-2462836902.99988
2002	-2258396996.74297
2003	-2413331239.1404
2004	-4265443453.34667
2005	-5406146175.54535
2006	-3652905687.02501
2007	3659499714.16155
2008	3331271323.14563
2009	5025132292.62895
2010	9158319582.1055
2011	16425631990.9732
2012	16180769685.7034
2013	19228893309.4712
2014	21821485861.6888
2015	17906591110.0633
2016	7730949557.73825
2017	10633135541.8131
2018	9008531789.25853
2019	9983836239.85825
2020	12360725816.1619
2021	-353931737.975651