Year	current US$
1960	81400000
1961	69900000
1962	55100000
1963	58200000
1964	28500000
1965	32200000
1966	24100000
1967	36000000
1968	31200000
1969	32600000
1970	55200000
1971	142871434.777885
1972	217837185.836857
1973	301768496.31904
1974	412823659.367652
1975	379882423.759315
1976	365837056.645719
1977	351189203.666232
1978	443003447.231954
1979	579271595.729435
1980	590125036.39967
1981	536112379.871281
1982	606451444.562068
1983	567292885.971097
1984	406309965.820788
1985	232714499.121265
1986	305283085.636001
1987	525493546.510803
1988	899299982.505955
1989	961889499.829159
1990	794803876.740977
1991	789899912.74371
1992	851986295.323607
1993	853832326.99801
1994	1461543335.43065
1995	1605270606.54529
1996	1897641348.68686
1997	1978069034.96179
1998	1850076407.14432
1999	2261512563.70172
2000	1811048065.05158
2001	1989226499.40431
2002	2290303433.88367
2003	2945362888.63693
2004	3935738521.72347
2005	4436695856.5589
2006	6773162199.19484
2007	7850771162.05129
2008	8849300098.88531
2009	11057312681.3622
2010	9459271537.07788
2011	7453548708.15057
2012	8357241400.54899
2013	7287446499.83122
2014	7235102302.87675
2015	7328121960.29189
2016	5887271590.03259
2017	5861349079.65126
2018	5381970558.89029
2019	7587967404.82365
2020	9394588874.82627
2021	8445135076.37304
2022	7695609708.95378
2023	8786017488.47506