Year	constant 2015 US$
1960	29433023837.68315
1961	32281366923.720352
1962	29433023837.683155
1963	24211014003.40799
1964	31094538440.942867
1965	32281366923.720356
1966	31094573232.626846
1967	32281488602.33144
1968	35129893689.80639
1969	43200298767.1177
1970	44163994201.2754
1971	48991927532.39551
1972	49490266251.182556
1973	47164202352.77232
1974	47686429445.15614
1975	48540998138.94855
1976	51911387021.93745
1977	62759021166.39791
1978	52765955715.729836
1979	58154183585.48882
1980	62868748841.400055
1981	53453563949.804794
1982	42793381597.077515
1983	42964345046.46242
1984	41188032061.14223
1985	35378578810.2516
1986	39284648677.255844
1987	44366479385.82857
1988	42804898715.37612
1989	33558372773.41091
1990	27903757037.25902
1991	36258610274.851234
1992	48094677583.60403
1993	55002965429.06196
1994	61952880204.719345
1995	54124858891.20472
1996	61216972753.79141
1997	71374562333.29488
1998	74871471352.96713
1999	62201968787.8538
2000	59833373722.13539
2001	52693129269.76391
2002	32883416849.57259
2003	46099764656.88758
2004	59751476384.42097
2005	68592502942.907265
2006	73302412020.6709
2007	88204836540.46564
2008	94099958646.00212
2009	72389645451.01176
2010	95946771647.20032
2011	111387236082.20291
2012	98928498895.75748
2013	103547495760.09401
2014	97103185691.36385
2015	101527895313.53004
2016	96366224812.49918
2017	111257073625.2683
2018	100301480488.22319
2019	80271355307.75601
2020	75124751401.71855
2021	99249630131.94563
2022	106799198251.5651
2023	105515263566.114