Year	current US$
1970	74685479.8344792
1971	69758610.3741012
1972	96103405.2027316
1973	117545241.04641
1974	227223405.400348
1975	298705695.24896
1976	474242109.087644
1977	387962721.15097
1978	352220631.619701
1979	450819350.387544
1980	627781633.115933
1981	608750098.434244
1982	665285757.983049
1983	714968975.837464
1984	679152636.893189
1985	697429590.008077
1986	655718466.006946
1987	704056698.718109
1988	816581230.203146
1989	954463157.11612
1990	1080087177.90559
1991	870535516.232366
1992	817990504.114876
1993	567255922.713223
1994	636512339.427733
1995	647609022.600843
1996	605686765.930098
1997	604309824.635449
1998	1293194383.97534
1999	1075845218.95412
2000	1015892190.01077
2001	1259381839.51987
2002	1194885400.04879
2003	381749238.477308
2004	281122074.684573
2005	2320055329.70121
2006	4417144515.81094
2007	10215264799.456
2008	15130391964.2901
2009	3003475069.89473
2010	11884683208.4966
2011	16579108603.4285
2012	10745352971.4387
2013	11079257759.57
2014	8460725570.43937
2015	4508443236.91678
2016	6013374244.25864
2017	6359852064.89281
2018	5934927822.57055
2019	5718422307.59694
2020	5168848840.97276
2021	23221623969.3388