Year	current US$
1960	272230000
1961	150330000
1962	154000000
1963	116500000
1964	117100000
1965	126890000
1966	105500000
1967	77100000
1968	90300000
1969	66200000
1970	36600000
1971	36111438.0362754
1972	93657173.8894275
1973	176079305.167838
1974	71493084.9022885
1975	124715059.362711
1976	91737797.8735437
1977	148592891.516803
1978	277163532.15608
1979	289107930.363199
1980	180438262.377928
1981	145598372.792209
1982	138887528.267335
1983	144809077.11062
1984	301558812.574186
1985	478503778.558875
1986	512957114.723619
1987	195131563.790095
1988	221322966.990082
1989	347310374.011091
1990	218838690.586277
1991	550244879.772275
1992	319911356.167586
1993	409680881.115919
1994	583873906.97559
1995	697464725.119216
1996	828724932.128519
1997	537823949.743103
1998	376979175.320149
1999	453774151.89043
2000	232054898.386218
2001	298239905.544189
2002	539747049.997825
2003	1352814059.67805
2004	1626651259.35718
2005	1752904040.26241
2006	2090294866.51141
2007	1984027597.67966
2008	1769805537.49439
2009	3386234835.02409
2010	4763206128.84547
2011	5483389037.24248
2012	5367514328.20187
2013	5249274626.3869
2014	5224823271.19552
2015	5444785886.29529
2016	5544731696.16504
2017	6650870659.64987
2018	5934707914.02725
2019	7135247340.92838
2020	7352692438.70727
2021	9405468799.67781
2022	4696186862.278
2023	3044370594.58702