Year	current US$
1970	239.213432615984
1971	57.0368830777622
1972	93858.7081280004
1973	4488482.24396208
1974	83137905.5368874
1975	48753148.723032
1976	59842556.9552595
1977	58269335.2229614
1978	80640702.3581164
1979	255223095.807178
1980	301707098.179085
1981	230893370.020972
1982	105186827.417668
1983	267454745.180752
1984	352972505.234279
1985	380144556.60291
1986	136406246.584945
1987	320391641.933719
1988	294813193.406494
1989	615650587.425631
1990	825266998.982955
1991	457111538.310882
1992	559097884.247554
1993	622250777.414654
1994	392442932.970863
1995	465316066.642462
1996	596870632.460271
1997	641607240.085096
1998	324867844.452366
1999	591869647.724319
2000	1366909789.12357
2001	893030082.401353
2002	897468957.581258
2003	766288075.030965
2004	1161239027.76667
2005	2046345247.69299
2006	2876343827.0376
2007	2550531950.85954
2008	3851421323.81689
2009	2188909053.28437
2010	3956688134.11901
2011	5513904030.18882
2012	4744817393.37068
2013	3174110982.03637
2014	2609624187.19479
2015	816070931.993895
2016	721948896.627555
2017	1649022152.61123
2018	3389700297.5315
2019	3023480590.33017
2020	1496537595.99378
2021	2796184843.75635