Year	current US$
1970	484940906.299684
1971	465219344.523338
1972	509562815.992935
1973	463969080.793435
1974	713382666.850119
1975	815431045.030023
1976	829692610.878007
1977	597071240.95217
1978	516160490.45687
1979	221996299.589171
1980	193945429.161828
1981	460221022.980105
1982	689972380.497152
1983	783215060.589899
1984	761582035.340954
1985	732868381.568624
1986	1030533573.95013
1987	884725416.20501
1988	884608243.15756
1989	1213373267.82514
1990	1272145765.0973
1991	1273865061.34721
1992	1370582500.96469
1993	2119471026.80821
1994	3048169600.11474
1995	3806283313.00957
1996	4671581726.63778
1997	4738806970.36221
1998	3924799979.02761
1999	5122522596.22507
2000	6080882043.59111
2001	4965070099.5903
2002	4612492976.86658
2003	5747052969.26138
2004	7089676584.46711
2005	7479404143.05299
2006	8786689413.37138
2007	12134557037.0413
2008	18388606157.879
2009	24971472966.6052
2010	32846335722.4039
2011	47798927830.484
2012	51825261830.5909
2013	53708762703.4339
2014	54415644648.3779
2015	54727138207.4194
2016	52419648599.9833
2017	53398298667.2827
2018	59124872462.0442
2019	60536662069.0284
2020	69622967004.7365
2021	56036281287.8501