Year	current US$
1976	152991423.010762
1977	134921653.51871
1978	150378287.519544
1979	173648084.240411
1980	61122469.2015354
1981	85870043.1431959
1982	104621072.516061
1983	122769034.317474
1984	138726486.988554
1985	182012907.606752
1986	361996200.588031
1987	487062507.954855
1988	527678029.277519
1989	482986717.970982
1990	561370039.419087
1991	636782350.628349
1992	731858761.902327
1993	664965652.795771
1994	591364343.531661
1995	607200125.187638
1996	660729905.097052
1997	631735989.109918
1998	603406276.486294
1999	596361261.73471
2000	724113797.515323
2001	826612148.273341
2002	848498814.641121
2003	946485309.080196
2004	894157628.13808
2005	542374532.370063
2006	765305372.516986
2007	1253517214.94986
2008	778972689.461602
2009	153140346.00151
2010	78304542.2292039
2011	-155665973.192171
2012	-319659684.010812
2013	-402659889.117119
2014	-607474376.803309
2015	-391155481.091804
2016	-299180029.268963
2017	-20903068.0613518
2018	-119914080.668048
2019	-136983995.960686
2020	-767307673.173537
2021	-378174954.630462