Year	constant 2015 US$
1960	3468682521.428298
1961	5550998644.890279
1962	6108465205.953968
1963	7094733582.144783
1964	7856655865.911872
1965	9548695401.761763
1966	7247823196.447592
1967	8097871600.938382
1968	9153633909.153122
1969	7526304745.708393
1970	8866843378.353739
1971	8880943840.993116
1972	8398762591.970313
1973	8702171598.48622
1974	8281176062.891152
1975	9227661336.204697
1976	9398375730.364717
1977	10527157329.947386
1978	10936319285.19545
1979	11478175335.346292
1980	12407285645.497602
1981	13150827191.448692
1982	15587918605.52044
1983	15970138901.9583
1984	16748677892.474522
1985	18448773668.95686
1986	19255012355.681442
1987	20018947589.489452
1988	19784276790.493965
1989	21263051415.903755
1990	22356832993.2831
1991	23030627939.540573
1992	25422649065.65944
1993	26425787060.494846
1994	26223598352.88959
1995	27226736347.725
1996	28762917295.548573
1997	27723521302.23796
1998	28568282340.889816
1999	25942598855.53404
2000	27271303471.863075
2001	28569454370.571575
2002	27967377876.097656
2003	30454122873.53198
2004	33336305643.677105
2005	36412473761.51059
2006	42909664022.901436
2007	44404685952.57083
2008	45986119717.41845
2009	44399202162.70928
2010	41376681971.00779
2011	38301545162.66002
2012	39683073466.71377
2013	40741811818.17555
2014	42142092105.28208
2015	47427027648.399796
2016	51714032433.96356
2017	55547727118.368034
2018	61025467953.12795
2019	55108200865.14284
2020	51769564483.19446
2021	53844549252.019035
2022	55704694065.37829
2023	47744176984.65661