Year	current US$
1960	260000000
1961	306000000
1962	180000000
1963	231500000
1964	189200000
1965	178500000
1966	267350000
1967	286700000
1968	286450000
1969	204250000
1970	147900000
1971	298618473.552705
1972	285101373.520115
1973	912191778.864457
1974	1454279249.83138
1975	1128326192.4192
1976	1764938202.28525
1977	1683573587.40534
1978	1980500820.89359
1979	2658756939.23247
1980	3772615310.34183
1981	3695344111.87274
1982	2421996371.09968
1983	1880389415.57597
1984	1464155000.80686
1985	2818953427.06503
1986	1660195173.26581
1987	1640459717.11898
1988	900193484.140975
1989	846995058.743134
1990	724759955.044031
1991	1485886738.4743
1992	1457045003.91876
1993	1474742798.52566
1994	2673875248.72154
1995	2005167336.57585
1996	4235006161.63766
1997	8046742631.74086
1998	6845539222.62977
1999	4525667963.23314
2000	12023903987.4191
2001	18081413033.0419
2002	23237503813.4625
2003	33125171865.8288
2004	43246380713.5136
2005	56303086193.2939
2006	77913736744.715
2007	110317600020.227
2008	143242995145.07
2009	149040598478.4
2010	162614490298.19
2011	182821825955.915
2012	191297104701.131
2013	194712107088.462
2014	179617718599.046
2015	144677455937.501
2016	114390744334.26
2017	97614427695.3787
2018	80227698867.583
2019	63297610714.9485
2020	48882051109.5108
2021	46054847199.3665
2022	61739377093.8577
2023	69708546411.6242