Year	current US$
1970	4622958.30731113
1971	7910112.11801807
1972	10338798.32666
1973	19662148.6989287
1974	182382276.117765
1975	284689112.45291
1976	401897738.239123
1977	507477764.76666
1978	886166985.116035
1979	3504689631.59707
1980	7950688771.88408
1981	8197927181.68088
1982	6276745986.47574
1983	8220311821.63207
1984	11514659933.9942
1985	10630429570.1293
1986	4162297551.43388
1987	7198002639.96025
1988	5357880054.03988
1989	8207590604.15367
1990	11501564110.9524
1991	6800708793.97439
1992	7259694044.51368
1993	7010842954.95178
1994	6829338722.68813
1995	7630080626.8897
1996	10433879294.8458
1997	8209940451.44946
1998	4416667244.00702
1999	8946653834.39178
2000	16805331683.1542
2001	13353898960.179
2002	14779127635.4212
2003	19374094973.9531
2004	26025831172.7518
2005	39409243600.8711
2006	47484916104.7172
2007	47593839814.5091
2008	59335952504.6917
2009	28560375887.8116
2010	37990582120.8925
2011	60472077386.5642
2012	57936115753.8621
2013	52511727431.4866
2014	45907195934.6041
2015	16324835155.325
2016	12052376010.5922
2017	16125094032.9542
2018	24618002376.1774
2019	18614322910.6783
2020	8832622817.54677
2021	23690738130.6303