Year	current US$
1976	14395023.922266304
1977	28168155.000711672
1978	39482388.48454147
1979	33291090.482712924
1980	51933305.47417341
1981	38706401.95657151
1982	19816000.479581144
1983	28725071.069886364
1984	49661331.97764866
1985	60084221.25356897
1986	72016971.62332764
1987	93648158.16678382
1988	107015937.14020851
1989	96440455.03631291
1990	92489650.44249023
1991	86617794.62403369
1992	96847238.18243532
1993	107619423.52616487
1994	136086480.95508903
1995	120462064.27735102
1996	160860071.70893148
1997	129910718.89361484
1998	121199060.38127388
1999	163830787.0117666
2000	132740288.92047758
2001	128994051.47403334
2002	152476155.58215338
2003	146812066.39857602
2004	256323183.13224602
2005	302910265.0840909
2006	258930057.7026632
2007	201972404.7106362
2008	63461130.59386455
2009	95152828.71800874
2010	162615156.5106667
2011	151452188.16985473
2012	256917947.00723037
2013	351172645.4236503
2014	110231059.88740349
2015	170156156.38466108
2016	115911879.11096588
2017	121229376.48490319
2018	96328563.1398775
2019	169154935.19986615
2020	-49469459.26033531
2021	-164993028.94205737
2022	42471491.44407725
2023	67677447.2889934