Year	current US$
1970	52265.0595181396
1971	66337.2306006592
1972	17497792.7691971
1973	99082947.9050571
1974	456710630.093005
1975	393229175.72768
1976	504333091.5168
1977	420095735.773807
1978	517515333.500797
1979	1401910208.28413
1980	1670712683.43547
1981	1452065143.60827
1982	844002903.295257
1983	1354892960.47934
1984	1410416269.28789
1985	1458246067.31113
1986	641507574.7318
1987	539919779.089773
1988	783238363.110467
1989	1093030893.38943
1990	1611863785.00017
1991	916884115.680812
1992	913302552.383065
1993	919041344.922657
1994	1024424813.49199
1995	1241486809.93173
1996	1531952062.74886
1997	1337471932.50767
1998	663777987.54716
1999	1113098272.69441
2000	2179986537.19739
2001	1488905341.21956
2002	1471347640.50208
2003	1790861092.15768
2004	3223743451.05914
2005	5428169361.19626
2006	6792866933.37188
2007	6682537051.77374
2008	9125445228.03299
2009	4261634793.49654
2010	6380134370.84653
2011	10523428058.2293
2012	10285288798.5932
2013	9775611016.74628
2014	9771847926.86041
2015	3586571301.50767
2016	2833503450.91284
2017	4094887630.42873
2018	6507381964.6208
2019	5366500824.42254
2020	2255771454.28824
2021	6006390957.61856