Year	current US$
1974	196506375.19003162
1975	286963585.4864546
1976	224314271.9763534
1977	199039628.37595117
1978	205622827.1669967
1979	311204326.2508821
1980	610092159.6507528
1981	960139126.7723432
1982	1290602342.8592517
1983	806159489.3752221
1984	666656496.3217657
1985	654405179.623053
1986	544621093.1477506
1987	453309181.72944295
1988	411954788.2876547
1989	346699455.61510295
1990	482251123.8581465
1991	535612546.802248
1992	603721004.565608
1993	776938820.0126543
1994	936681558.6156353
1995	725796639.0942802
1996	805933030.1685792
1997	501684710.63785756
1998	474440474.3930129
1999	626022232.5239952
2000	675013539.0270334
2001	734659605.2153322
2002	684009590.0319341
2003	892749619.654287
2004	1020132244.8899344
2005	1557651917.225256
2006	2046739188.9515374
2007	5154246153.631826
2008	4607008545.095627
2009	5136742046.25226
2010	5098923317.74858
2011	5302277528.55029
2012	6750107174.264479
2013	8451717306.834799
2014	9824443526.590498
2015	9699252801.098614
2016	8506922493.577899
2017	4339045028.216964
2018	3892299350.7505393
2019	3650073461.8236756
2020	2667127647.247942
2021	3282211574.48388
2022	3272632068.115298
2023	3815635381.3670826