Year	current US$
1960	155200000
1961	205200000
1962	166800000
1963	129600000
1964	133580000
1965	142990000
1966	241810000
1967	353220000
1968	387720000
1969	549520000
1970	606310000
1971	433512664.928845
1972	522997834.039301
1973	884812521.932098
1974	277189602.822971
1975	781321706.356585
1976	1970012072.60043
1977	2967095714.50877
1978	2763913976.43036
1979	2959163421.70392
1980	2924862814.08637
1981	2681693225.85724
1982	2807315486.59583
1983	2346696252.02031
1984	2753608079.89718
1985	2869320650.26362
1986	3319582502.17117
1987	3583678598.07913
1988	12346693909.3808
1989	15213574174.0479
1990	14792998068.0315
1991	13701099343.4322
1992	17120615552.6833
1993	20228158987.2473
1994	25639257349.6758
1995	32677736705.7711
1996	34037122878.1534
1997	20367914256.185
1998	51974523195.0888
1999	73987290347.1221
2000	96130459623.4075
2001	102753282491.492
2002	121345249455.919
2003	155284241117.687
2004	198996564800.159
2005	210317176838.75
2006	238882310981.532
2007	262150152963.913
2008	201144481976.073
2009	269932931249.851
2010	291491117611.862
2011	304254938469.971
2012	323207083967.485
2013	341649679569.216
2014	358784966287.362
2015	363149330364.607
2016	366307950374.068
2017	384453153318.384
2018	398780329741.702
2019	403704746313.856
2020	437112592614.303
2021	457169379936.912
2022	417280090434.55
2023	414004455885.985