Year	current US$
1971	1886435137.8056
1972	2351370849.11999
1973	2919092239.3629
1974	3470305908.92073
1975	3773053818.77254
1976	3634132361.21255
1977	3616400911.93972
1978	3729855064.17489
1979	4385216185.68293
1980	5363886270.15207
1981	6845818332.36236
1982	6719832395.23559
1983	6217490949.1161
1984	5310897561.20899
1985	4605161169.51079
1986	4779326272.1668
1987	5069264471.24983
1988	5866203708.16874
1989	6505726630.75982
1990	6639099371.74281
1991	6264416639.47352
1992	4556878595.24555
1993	4603836052.74566
1994	4474240283.32898
1995	4397464748.40688
1996	5801831761.79786
1997	5199125101.95147
1998	3269724088.16527
1999	3963028968.17588
2000	3648883135.59402
2001	3967045904.94542
2002	3781694830.84654
2003	3259312962.72159
2004	2838814401.22178
2005	2794143961.08253
2006	1999539830.3989
2007	1534688238.42544
2008	240072014.457882
2009	7402835180.97556
2010	9372241949.57747
2011	10408194388.5304
2012	12963740082.5096
2013	15166271748.9124
2014	14990515740.3529
2015	15403238923.9308
2016	15640355814.4896
2017	13388596245.2217
2018	29812469439.0125
2019	18704431729.6674
2020	18195165638.5009
2021	23546536254.0077