Year	current US$
1970	625616.465946384
1971	765747.873547304
1972	2711303.02963336
1973	9051236.99236193
1974	69412551.8373393
1975	80189036.9104479
1976	93678899.0736766
1977	107114789.372904
1978	112233630.825108
1979	295775936.186792
1980	334820113.521266
1981	240776117.549911
1982	179848070.171719
1983	211160141.123268
1984	228374665.001421
1985	216543465.088877
1986	103428797.727067
1987	88686955.0290117
1988	47810476.5953685
1989	62203811.532094
1990	87379908.3837021
1991	55738188.4612185
1992	57748770.5515731
1993	53725644.9312917
1994	50214260.407617
1995	40682522.0963614
1996	42790107.2369813
1997	39787434.2266873
1998	28790805.0938291
1999	38756652.0857268
2000	142251693.605558
2001	265880241.393821
2002	316584678.175647
2003	471146197.419207
2004	629852741.587249
2005	960843569.79835
2006	929299251.05474
2007	951150174.576887
2008	1084637864.82779
2009	715734048.219114
2010	963086887.835583
2011	1185258294.85423
2012	1060515790.87396
2013	1011745657.52593
2014	1437900720.52169
2015	1585010684.99764
2016	1265532810.61768
2017	938368378.605693
2018	1215214769.94878
2019	1235742474.79718
2020	919955518.275722
2021	1510000629.57146