Year	current US$
1970	39441.8548311407
1971	291940.747701085
1972	588593.395693845
1973	1527852.23803106
1974	11474997.6741747
1975	13993633.6744061
1976	15162637.4152019
1977	12776089.0689172
1978	14069593.2925952
1979	37182306.3871493
1980	18038259.8789161
1981	32614873.6552915
1982	27478603.4411782
1983	48870074.1531049
1984	65432544.7511256
1985	73144623.9548775
1986	33917937.5180717
1987	55059235.7242017
1988	32637845.8590911
1989	49510302.4289118
1990	65336620.8570859
1991	34905176.0107957
1992	46643802.1434036
1993	55009568.3921272
1994	91657568.548392
1995	95379854.5106221
1996	147176346.441157
1997	139993773.325806
1998	53409225.3278951
1999	110248311.804883
2000	236065845.562313
2001	189518204.348405
2002	138923738.737296
2003	192908596.091241
2004	240112514.26939
2005	283701558.822157
2006	363257799.166633
2007	783668946.995428
2008	1039332417.71745
2009	527705845.946204
2010	727043600.656716
2011	1161415126.49393
2012	1118205157.63044
2013	1027699036.56301
2014	941011982.923828
2015	361806083.33153
2016	273634241.407658
2017	404801663.456356
2018	674810507.586344
2019	520092434.830782
2020	218998814.820761
2021	563303853.567493