Year	current US$
1960	293750000
1961	89000000
1962	63000000
1963	21000000
1964	21000000
1965	17000000
1966	19000000
1967	2000000
1968	82500000
1969	117700000
1970	156020000
1971	142632571.521668
1972	572201254.045819
1973	804734754.873315
1974	1489500450.68711
1975	584333682.198302
1976	1496517035.94093
1977	2508735426.01056
1978	2626116696.84569
1979	4061820824.73847
1980	5391696429.32938
1981	5014169714.47374
1982	3144462597.54433
1983	3718393210.57414
1984	4773006288.11448
1985	4974241388.4007
1986	4051268547.94319
1987	5592324796.7768
1988	5048319766.92549
1989	5453531101.00665
1990	7459057855.20195
1991	9257939411.23461
1992	10448611002.7913
1993	11262656751.5158
1994	12132678563.0136
1995	13708247115.922
1996	18251104717.3555
1997	16586889411.8885
1998	22713375176.531
1999	26445032417.3645
2000	28501860111.4768
2001	27246209680.3382
2002	30970717497.4441
2003	34962311391.5962
2004	34952495909.3168
2005	33140499049.2525
2006	41103145281.5939
2007	54976431523.296
2008	49596713221.3198
2009	63563292968.1398
2010	92908055584.0428
2011	106538747662.435
2012	108837307833.066
2013	96363531239.0833
2014	108835534561.997
2015	103268247088.719
2016	113493392851.059
2017	126857395382.957
2018	117424645942.922
2019	125339390220.657
2020	131139029065.842
2021	140310235087.496
2022	132644357980.272
2023	141149364857.112