Year	current US$
1960	422000000
1961	196000000
1962	54000000
1963	192000000
1964	82000000
1965	170000000
1966	132000000
1967	643010000
1968	650650000
1969	402790000
1970	532570000
1971	192447207.124963
1972	313304055.175402
1973	1148704505.79734
1974	1144325481.31192
1975	287785746.10848
1976	1444855224.28095
1977	3153791555.42708
1978	4966494541.78131
1979	9388041760.12705
1980	6719462057.32018
1981	3268356776.17427
1982	2506393809.47171
1983	1172355965.03204
1984	1242617532.02895
1985	3273000000
1986	2718000000
1987	1617000000
1988	3363457536.56928
1989	1463302257.73386
1990	4592335362.99099
1991	6004650836.08691
1992	9989728906.7334
1993	13791118837.702
1994	14326930188.189
1995	14287809201.6387
1996	18103917851.0624
1997	22319837893.1717
1998	24752133225.8541
1999	26252058986.3723
2000	25146902694.4134
2001	14553064259.6102
2002	10489340068.7375
2003	14153439664.9625
2004	18884342753.9788
2005	27178838501.5579
2006	30903465112.9806
2007	44682056855.7802
2008	44854620206.9801
2009	46092988635.3253
2010	49733869724.0928
2011	43226830957.7587
2012	39920301983.203
2013	28143038630.9564
2014	29016954813.9639
2015	23416510884.8894
2016	36323299976.5464
2017	53030809531.8904
2018	63963922085.1007
2019	42192526746.9573
2020	35649970285.7587
2021	36448369071.8398
2022	41197886699.1547
2023	18986771972.2626