Year	current US$
1960	78000000
1961	62000000
1962	50000000
1963	63000000
1964	40000000
1965	25000000
1966	29000000
1967	22000000
1968	26000000
1969	128000000
1970	304140000
1971	631428586.944714
1972	1262080777.45191
1973	1985872127.48642
1974	1561691904.70725
1975	943818501.125961
1976	990470646.351815
1977	638036441.378014
1978	801299643.034341
1979	658197599.821103
1980	1077000000
1981	928209511.837663
1982	1080121341.82004
1983	1288125373.01484
1984	1270680373.29486
1985	1055929261.86292
1986	1411594877.25221
1987	1775836939.09688
1988	2344492887.99774
1989	4780460640.7864
1990	6049535118.29395
1991	5144174312.3203
1992	6159412666.5475
1993	6271512909.31373
1994	7169312960.67317
1995	12441845319.3564
1996	16435819484.867
1997	18658335761.0854
1998	19488809978.6684
1999	23345860685.8992
2000	22488440255.1615
2001	18879205044.262
2002	27068603592.9479
2003	33990987003.7045
2004	35669142865.7953
2005	50579001444.9876
2006	60891882734.8823
2007	73383889194.709
2008	70428065015.1764
2009	70873658697.6394
2010	80712981658.9094
2011	78322380031.4294
2012	99942631608.9645
2013	110926748052.956
2014	106906397642.209
2015	92920827378.6929
2016	90919204818.2566
2017	84115053501.0137
2018	72866830470.308
2019	78532272033.2221
2020	49958256077.0715
2021	71046318472.1336
2022	77888776365.8925
2023	92694068791.6959