Year	current US$
1964	292245098.0392157
1965	287114845.93837535
1966	297478991.5966387
1967	302900552.4861878
1968	275870348.1392557
1969	292436974.789916
1970	322448979.59183675
1971	322141997.5932611
1972	358551810.23720354
1973	367156862.74509805
1974	425847953.2163743
1975	527212389.380531
1976	479964061.09613657
1977	550436300.17452
1978	687010506.208214
1979	832355723.7464522
1980	998380952.3809525
1981	1010785159.6203623
1982	1142453591.606134
1983	873899204.2440319
1984	893266932.2709163
1985	785669434.6289753
1986	387658451.4044246
1987	473078162.9116118
1988	770960195.6080458
1989	729072250.1797268
1990	510003565.62735236
1991	601415509.6512022
1992	574229074.8898678
1993	664933920.7048458
1994	700102266.9166524
1995	813989671.6101695
1996	873930704.8984469
1997	810232297.5038207
1998	625076745.9708365
1999	631049772.7524664
2000	672950623.7751542
2001	1030013090.3232303
2002	1182598380.1810384
2003	1301160185.6978576
2004	1314122089.3643801
2005	1471794594.9387941
2006	1634674124.0193403
2007	1933103665.902225
2008	2287280795.166216
2009	2274864501.6466556
2010	1964559347.2440398
2011	2566282883.921087
2012	3087940068.664224
2013	5300793145.018614
2014	5056854336.210185
2015	4349185677.698976
2016	3753515136.8693504
2017	3480824659.2290373
2018	3990842111.686473
2019	4019440266.78147
2020	4111061496.184051
2021	4506014363.81793
2022	4132221403.579958
2023	4047712063.7005653