Year	current US$
1971	5400000.095
1972	3279988.05
1973	7940000.057
1974	40839782.482999995
1975	346098682.89000005
1976	553278403.5977001
1977	976756161.6738
1978	1394274469.8888998
1979	1837805283.9695997
1980	2377241233.2755995
1981	1964236330.9240003
1982	1766395635.7875
1983	1725394589.7640998
1984	1578360718.0440998
1985	1532752901.1707997
1986	1582462192.0888999
1987	1469279867.8555999
1988	1533130133.1988997
1989	1326282512.9174
1990	1322035917.891405
1991	1233842049.8700204
1992	1508157014.6407714
1993	1511764946.110761
1994	1671243232.080741
1995	2019923629.8412287
1996	2036641976.078992
1997	1941636674.5767045
1998	1634194658.746989
1999	1556791539.5217285
2000	1908503781.0430765
2001	2335096744.7654047
2002	5562101924.101898
2003	7604387310.431654
2004	8374904835.955011
2005	8678991858.52121
2006	9079347222.01033
2007	9860456127.071383
2008	14139116408.290112
2009	14521590986.736616
2010	14727646829.189142
2011	15756101169.350313
2012	19577429918.466446
2013	23194524093.158413
2014	23325871159.788605
2015	21117586391.64407
2016	20742876327.888535
2017	21903363872.796535
2018	22244143709.082767
2019	22029242762.279926
2020	19744262262.970352
2021	20424110788.349148
2022	24159285235.33587