Year	current US$
1970	476.134009602507
1971	156.301931300105
1972	50.6080551823896
1973	50.6040806155409
1974	429.230630974931
1975	395.827159259488
1976	0
1977	1433.76247220155
1978	0
1979	1354.26533813745
1980	0
1981	0
1982	5611.5997306119
1983	5159.79706055965
1984	5129.974328252
1985	8809.94682185954
1986	4398.0823404117
1987	3584.89477630428
1988	3671.51144229564
1989	3094.36456822514
1990	4580.21586529424
1991	0
1992	0
1993	0
1994	0
1995	3364847.62834825
1996	1198742.64250071
1997	13666.0063053591
1998	18715.930344297
1999	81068.771587168
2000	82503.6534680968
2001	53754.712016052
2002	13205.5321367668
2003	1213011.42164596
2004	10236608.5020817
2005	16997379.0633351
2006	45691192.6458846
2007	47155244.3452351
2008	43055156.5373727
2009	27201853.155126
2010	54315629.4276038
2011	71564558.1380404
2012	51675688.3354853
2013	30117180.0323754
2014	22240499.2736692
2015	13973169.8407135
2016	20289873.6509825
2017	47736830.9408976
2018	66802028.3718451
2019	65063144.1448473
2020	33090275.9478654
2021	76395315.4601019