Year	current US$
1970	638214.456532793
1971	848630.38408644
1972	912185.662411328
1973	4797168.82809107
1974	80475535.0493419
1975	82524421.3615102
1976	78144802.1112116
1977	45262781.2752268
1978	43139013.9342965
1979	113521730.874844
1980	212138233.616666
1981	116705591.445007
1982	143903088.797045
1983	292657643.127698
1984	208112080.545581
1985	212348549.738638
1986	75220667.0146769
1987	112815590.718427
1988	79870359.1051
1989	93622427.9700878
1990	106840170.418346
1991	74051562.6145144
1992	70844723.1952365
1993	52510431.3269353
1994	40349316.4622267
1995	38397626.5034353
1996	39814370.4472915
1997	21467691.6904392
1998	10412220.7596812
1999	16228480.4412992
2000	30108158.5746392
2001	64432889.0899374
2002	47239603.0285624
2003	23515227.1902622
2004	40990115.447246
2005	23542423.1229991
2006	21182628.985515
2007	26751909.4494772
2008	53598168.4151901
2009	15603056.3010477
2010	26474258.2457167
2011	27608053.157849
2012	22338092.8725988
2013	65229614.1226277
2014	42521246.5118344
2015	13923281.6233623
2016	5173672.62605451
2017	5911355.69343355
2018	9520140.5470167
2019	6579785.78630909
2020	768085.642796102
2021	3540256.06511929