Year	current US$
1960	535670127.74893546
1961	584961208.6565945
1962	619319197.3400222
1963	678235373.038558
1964	711893367.5552704
1965	736568861.9261507
1966	723735635.5363705
1967	761981474.0233588
1968	758899950
1969	779200000
1970	821850000
1971	896754316.6742619
1972	1083381044.0847342
1973	1308799458.962842
1974	2042031901.4221702
1975	2442667573.0482073
1976	2500410583.791773
1977	3138666666.666667
1978	3562333458.3333335
1979	4602416625
1980	6235833333.333334
1981	6992083333.333334
1982	8140416666.666667
1983	7763750000
1984	7757083333.333334
1985	7375918367.346938
1986	4794444444.444445
1987	4797777777.777778
1988	4496852073.468963
1989	4323058823.529411
1990	5068000000
1991	5307905882.3529415
1992	5439552941.176471
1993	4669488516.37981
1994	4947205860.014515
1995	5329214163.220015
1996	5759537726.266007
1997	5737751331.6377945
1998	6043694330.21609
1999	6808982520.757593
2000	8154338232.959776
2001	8824873259.321054
2002	9008273720.933954
2003	11305459802.068275
2004	13280275123.035402
2005	15982282462.378565
2006	18369361094.388645
2007	21641620049.93521
2008	27871587349.541267
2009	19172165225.50151
2010	22157948396.20422
2011	25433011405.30167
2012	27334581560.283688
2013	28709988700.2142
2014	29699968760.72777
2015	27026080986.578022
2016	23713671528.142097
2017	24040299977.874477
2018	24569079488.391327
2019	23775754304.665176
2020	20807571314.304337
2021	24496505940.66731
2022	30053575132.141956
2023	28139944790.291103