Year	current US$
1971	0
1972	0
1973	0
1974	0
1975	0
1976	0
1977	0
1978	1251374.21852884
1979	9868758.03445506
1980	11560050.0767087
1981	7605832.32508343
1982	3075681.34534457
1983	6782716.41178907
1984	7766327.82259588
1985	4952451.97918433
1986	2015700.43857587
1987	53538.2605417996
1988	47227.9349137164
1989	43094.9741556951
1990	110165.044697613
1991	85686.4603844499
1992	3650164.13894168
1993	5317443.98565452
1994	3880902.00708804
1995	12099558.2601409
1996	21668017.9520559
1997	16882319.0567952
1998	7873092.22473133
1999	15265438.4592788
2000	39543622.5601335
2001	29080004.8239262
2002	31228070.1416208
2003	32116788.5335853
2004	47425280.6901359
2005	65237103.4065197
2006	78736478.4805709
2007	89207421.961835
2008	123301507.130542
2009	59244847.6330229
2010	63239858.3954413
2011	1200688606.8179
2012	902306194.874869
2013	1109800471.78784
2014	941802930.301389
2015	352320647.990324
2016	302431338.146425
2017	918659852.173452
2018	1642396427.71374
2019	1766185752.65914
2020	1040017903.28985
2021	1973222116.75909