Year	current US$
1970	0
1971	0
1972	0
1973	0
1974	0
1975	0
1976	0
1977	0
1978	1137040.64075877
1979	12544713.257911
1980	27903990.8110822
1981	27678406.2448348
1982	24443325.620831
1983	32530830.4543618
1984	29312454.6939126
1985	34862972.0068847
1986	17813764.8691603
1987	38464761.5449726
1988	95827057.7491232
1989	107987579.913268
1990	91694456.9947748
1991	36714067.5562264
1992	31662094.7098335
1993	21245717.3687227
1994	51447193.3698077
1995	93598120.5248269
1996	38754254.6695713
1997	44219106.1770969
1998	14279361.2397174
1999	12726629.1042257
2000	23670227.3122707
2001	18016177.4719091
2002	29866495.2504565
2003	27609066.4698352
2004	111866067.699827
2005	175387624.40937
2006	478666322.019339
2007	527003888.49855
2008	445341502.432258
2009	270576507.692264
2010	425668198.140993
2011	561476177.456035
2012	480146500.673694
2013	482392217.326883
2014	354724918.524862
2015	316808843.561382
2016	194843121.012276
2017	335792797.677618
2018	602792398.621242
2019	396963002.824964
2020	381985438.126808
2021	1501979334.1988