Year	current US$
1970	4979456.60388553
1971	4076802.05133938
1972	4106447.11053428
1973	6611589.3441886
1974	6877756.89141432
1975	5333470.18819161
1976	8144137.61986027
1977	6867636.57880239
1978	5550754.01397273
1979	7922464.39999564
1980	10085550.3848624
1981	7231124.92147017
1982	7434521.57637222
1983	8809671.60554362
1984	6399968.8026013
1985	7291190.25781489
1986	5105612.62548077
1987	7862302.32015658
1988	35419009.7396064
1989	38602488.2296194
1990	15705417.8748653
1991	9094477.04515415
1992	944165.062776175
1993	794917.6888975
1994	282588.014046001
1995	475474.728848517
1996	595473.11474918
1997	60095.4188703891
1998	273467.018214205
1999	103671.309214094
2000	0
2001	0
2002	0
2003	0
2004	383853.202683871
2005	1119834.38806482
2006	4871348.79403297
2007	29921689.2892984
2008	5667499.47099888
2009	2730501.68206989
2010	8289674.65260233
2011	14226364.751095
2012	9841060.71144393
2013	6950485.89048465
2014	8034531.58530126
2015	3903046.6834236
2016	153023.817072743
2017	0
2018	2855306.64984129
2019	2583454.16737369
2020	2037720.97299884
2021	11411821.3319041