Year	current US$
1982	-522000000
1983	33000000
1984	903666666.6666666
1985	1115000000
1986	-355214285.71428573
1987	-738000000
1988	-466704000
1989	27564709.95024912
1990	508322308.8888892
1991	-774221750.8677207
1992	-1061106845.8093411
1993	-1346342114.5241566
1994	-1517027863.7770896
1995	-3053462186.3640394
1996	-2774314468.4838853
1997	-2625375375.3753753
1998	-3078787465.0099
1999	-1210518540.4047866
2000	-1035559758.1592596
2001	-968615489.8663093
2002	-383204935.0427836
2003	237698321.45320764
2004	2596227078.3291345
2005	4822398155.731489
2006	8233372014.902584
2007	7515819750.71908
2008	1231415974.5719266
2009	5765885399.375872
2010	5870890668.554489
2011	8617697251.370684
2012	4391136440.669612
2013	-343092025.2755562
2014	-3291248744.295615
2015	-4912325216.4667
2016	-361178550.2014482
2017	4064422258.2631803
2018	3901901142.3040752
2019	2590972471.741588
2020	3578887311.688524
2021	6827891069.161775
2022	1374902514.3793736
2023	8744530328.06546