Year	current US$
1960	77300000
1961	78100000
1962	85600000
1963	101400000
1964	113100000
1965	136400000
1966	165400000
1967	182700000
1968	204500000
1969	206200000
1970	246600000
1971	223000000
1972	226498980.7545866
1973	301999849.00007546
1974	456000000
1975	446000000
1976	514500000
1977	655500050
1978	1234878272.6
1979	1479471525.3
1980	1795536832.4
1981	1688328750.85
1982	1293644183.95
1983	1428646953.3
1984	1688328750.85
1985	1726447179.8500001
1986	1712152768.95
1987	1703417295.6499999
1988	1824122245.83691
1989	1943711271.5172412
1990	1934349590.6128404
1991	1896551789.6439521
1992	2118269211.8809001
1993	2344007289.636439
1994	2590593425.9347353
1995	2888355828.9885297
1996	3165076342.9054055
1997	3548150098.8593154
1998	4090622570.162482
1999	4310374703.832753
2000	4773363655.506423
2001	4939695318.6457815
2002	5128837532.848031
2003	5609361468.081933
2004	6832799506.856914
2005	7560116527.195608
2006	8414884874.514215
2007	10082042434.281904
2008	11719468689.770575
2009	8369540251.176231
2010	10086959052.876143
2011	12567072763.951342
2012	13022871719.929752
2013	12647258280.636732
2014	12923231435.147152
2015	13027957170.539766
2016	12401102552.229212
2017	13585432742.523508
2018	14945193703.413267
2019	14740482898.63382
2020	12172518449.66624
2021	18014411249.193527
2022	22079730541.78095
2023	20964669560.53796