Year	current US$
1970	683698.596961682
1971	402407.512027077
1972	561588.714163126
1973	3177670.96720044
1974	61351833.5016582
1975	68279125.8662878
1976	16945612.8778672
1977	57717079.7970842
1978	458346.21393148
1979	2380647.40575692
1980	13198724.0075228
1981	20946013.2834256
1982	10237633.7170679
1983	8148416.22528817
1984	1591049.95903334
1985	1113151.91010468
1986	284874.028277112
1987	186839.930927336
1988	7942918.35245743
1989	6900081.19647034
1990	4232586.18594082
1991	1048629.20950572
1992	1040895.1200691
1993	363033.630344124
1994	3584995.64062417
1995	6228500.75831162
1996	4092138.10877778
1997	686865.379819818
1998	2274933.55067669
1999	1943863.05753712
2000	1421188.04531806
2001	311137.535736143
2002	143873.307695095
2003	399759.309193071
2004	5823175.37878067
2005	5656429.4758723
2006	47250839.1587319
2007	124950367.401305
2008	1213914953.93319
2009	1018838662.17548
2010	427673429.807137
2011	160458180.306968
2012	214826249.071957
2013	154705306.152743
2014	140203439.972722
2015	115109350.933055
2016	119252265.75686
2017	76485185.298018
2018	69393832.3808957
2019	0
2020	0
2021	0