Year	current US$
1976	2193673391.117588
1977	2273237865.2901506
1978	2739367952.2410693
1979	3171115800.3088007
1980	3550198893.8523717
1981	2817881458.4413342
1982	2598724691.4576106
1983	2460920024.5135593
1984	2435472801.04532
1985	2175389731.311519
1986	3195860297.4312754
1987	3970277535.916413
1988	4064799955.421821
1989	4008554342.173687
1990	5155570615.999032
1991	4885844431.34944
1992	4785919108.43977
1993	4196808233.7631607
1994	4826931694.976509
1995	5203043537.600655
1996	4703431245.126073
1997	4054684857.3683615
1998	3914150733.6594043
1999	3741674664.3822474
2000	3249952420.737262
2001	3299785780.976382
2002	3350508115.952947
2003	3912943963.3607764
2004	4450943708.289587
2005	3980864935.3463016
2006	4382366349.811759
2007	5512391588.45492
2008	5799100567.953124
2009	4607440565.47656
2010	4971410985.6666765
2011	6051859531.322969
2012	5520993880.781251
2013	5397697491.439231
2014	5314295407.427432
2015	4315472578.343748
2016	4395047361.782112
2017	5051098257.105891
2018	5144143368.345095
2019	4679000440.156856
2020	4646682210.428028
2021	5840832919.883627
2022	6526321587.256835
2023	6916226648.627573