Year	current US$
1970	832841.992387916
1971	3027497.18492062
1972	5520626.35045173
1973	11031843.5616037
1974	71462718.0563836
1975	53287977.6402928
1976	50009027.6388594
1977	49340474.8191132
1978	47036766.9579647
1979	102705972.679487
1980	132507662.300716
1981	100302016.863053
1982	56604810.7477567
1983	70702318.3627736
1984	82051350.204848
1985	75098886.7269498
1986	34704354.2990298
1987	47189325.3712405
1988	36247296.2745706
1989	52794953.5961147
1990	66965881.1449745
1991	24898851.3323032
1992	15171401.3307679
1993	16270500.9163492
1994	15003572.7054543
1995	13491404.9123081
1996	17372953.0932182
1997	10273205.5978518
1998	2033138.16077133
1999	4932160.06731355
2000	12345544.5275465
2001	9127025.27871949
2002	10303028.4834039
2003	14494348.0759974
2004	22605160.2071502
2005	31906311.3810716
2006	39141830.2165981
2007	54523545.8534868
2008	86548701.5402752
2009	46579055.7455263
2010	75198926.7336044
2011	171799289.88617
2012	207781261.641703
2013	261062357.389985
2014	294772824.329493
2015	116294928.249513
2016	68812958.9932423
2017	92534873.6813607
2018	136903129.733015
2019	139651544.116447
2020	51831049.4313845
2021	107565617.028537