Year	constant 2015 US$
1960	24147333336.947247
1961	27568193217.436615
1962	25354592011.521614
1963	21933732074.532394
1964	24147333336.947247
1965	25354592011.521614
1966	25354592011.521614
1967	26562075937.208954
1968	29982954766.1719
1969	36824609328.94947
1970	37452455337.11094
1971	40507091721.670715
1972	40949709271.08805
1973	37971548956.77774
1974	39500974442.10003
1975	39581458738.638084
1976	43726705037.93791
1977	52842300875.9203
1978	46081027514.53246
1979	49200216423.89687
1980	53297557753.609474
1981	45315748531.01275
1982	36278481288.30699
1983	36423417088.571495
1984	34917531481.45009
1985	29992514289.488663
1986	33303920798.332684
1987	37612089349.81368
1988	36288244984.35013
1989	28449417959.4127
1990	23655665665.80527
1991	30738569003.284443
1992	40772703492.66533
1993	46327225414.125786
1994	52661207597.974976
1995	45770986408.98431
1996	49836963889.77471
1997	58639598832.0611
1998	62476955246.50453
1999	54598702029.705475
2000	50883664312.61582
2001	42914748082.916626
2002	27273361805.660206
2003	37682562546.654884
2004	50654861461.280304
2005	58672701569.6979
2006	67164293724.50396
2007	80901540191.89006
2008	87936280775.26596
2009	68086553749.15817
2010	85962395051.72919
2011	100900907666.98099
2012	93761965457.94183
2013	95955516955.605
2014	89473196447.26599
2015	92571210122.05598
2016	87222011290.22954
2017	98892817130.20828
2018	93210783977.91371
2019	78342216931.03748
2020	68106055855.58978
2021	91128325708.1957
2022	101205396011.76067
2023	99302237131.29549