Year	current US$
1970	916395434.347437
1971	1041719995.35703
1972	982859583.760057
1973	1289781270.35324
1974	3622922986.33105
1975	3978822838.54681
1976	4761356584.32263
1977	5769463973.00358
1978	5579462731.67802
1979	13518523059.3597
1980	12215194731.8579
1981	5368283009.66741
1982	4162331649.28712
1983	3927764577.71283
1984	3801075370.77421
1985	3562644885.75578
1986	1635432391.20897
1987	1994849064.53338
1988	2323404937.56306
1989	3130443132.96045
1990	5491278842.46852
1991	3756285480.96522
1992	3739131445.76599
1993	3256148629.88551
1994	3013250949.31527
1995	2777405466.54977
1996	3536723073.96559
1997	3379646667.29109
1998	1979752475.62053
1999	2754445754.1796
2000	4522119170.5297
2001	3439194934.94252
2002	3284667811.81294
2003	4146121939.43132
2004	6443300505.90423
2005	10446247273.0448
2006	13902724472.8618
2007	15166306259.268
2008	20847723599.2791
2009	10137931366.4032
2010	13535598126.8613
2011	1779281143.4559
2012	15514099607.2491
2013	7189371999.86084
2014	2086337542.29686
2015	891048864.118788
2016	659924917.48345
2017	2604676784.22405
2018	4957996625.35927
2019	5390499703.18887
2020	612601859.748227
2021	5829662987.51809