Year	current US$
1960	75700000
1961	55000000
1962	91300000
1963	133100000
1964	171300000
1965	89100000
1966	141200000
1967	153600000
1968	171000000
1969	192000000
1970	245943000
1971	293731000
1972	426647000
1973	497806000
1974	643600000
1975	802733000
1976	780278000
1977	939238000
1978	1031844000
1979	1334725000
1980	1583500000
1981	1655500000
1982	1491200000
1983	1759798069.7
1984	2039295339.2
1985	861787468.5794035
1986	1180562309.1084943
1987	1314267896.7050722
1988	1232378021.1490617
1989	1703444621.1356468
1990	1631285364.268706
1991	1428531783.641418
1992	1858640000
1993	2218568000
1994	2633033151.0892634
1995	2976052836.0528364
1996	3500603155.203073
1997	4031537804.6184893
1998	5479228171.507377
1999	5124636630.431282
2000	6087226503.322507
2001	6036464524.932715
2002	6717126382.449791
2003	4292131426.6258087
2004	4562553369.799392
2005	8090243810.94382
2006	9803353059.538826
2007	11887130065.711397
2008	13528001888.016403
2009	11178094567.015234
2010	13571097247.212292
2011	14357187243.559813
2012	14612141168.502245
2013	13986694202.345222
2014	15303840630.445148
2015	16549927525.500383
2016	17370543319.702286
2017	18983743708.07743
2018	22056998493.21328
2019	23813035567.814613
2020	21560599407.340527
2021	29209306434.895355
2022	37669287691.55438
2023	39125671095.27472