Year	current US$
1972	21197593.7147858
1973	25760117.86049325
1974	33705150.43844516
1975	29899810.12309492
1976	25236961.076889545
1977	22371816.902295053
1978	23971323.78674358
1979	29709004.123578213
1980	39902684.11028992
1981	46060718.12390887
1982	41897399.00783591
1983	46717130.56964786
1984	68752179.49727273
1985	97125424.74290588
1986	123104700.40827419
1987	136804807.3739905
1988	172226295.59606525
1989	178032469.08966604
1990	206746316.40348577
1991	207693542.48743066
1992	237087673.10994583
1993	267452918.01033494
1994	312684782.5849239
1995	393872708.3191117
1996	430491362.38774365
1997	465614973.81271076
1998	498818811.0213166
1999	540744320.9232049
2000	579046006.583939
2001	642119785.6513588
2002	771889610.1272217
2003	1027752019.389128
2004	1173074698.772507
2005	1120423742.9539578
2006	1477519118.7555163
2007	1484042034.6178591
2008	1850234859.5626569
2009	1913365564.5540533
2010	2166179359.9708905
2011	2505900782.2476344
2012	2630682541.9827223
2013	2820138520.592713
2014	3190230602.3514886
2015	3516054032.9009323
2016	3874022941.781884
2017	4308122829.737183
2018	4836661273.386686
2019	5244811843.713185
2020	3543183695.8910394
2021	4877874879.493159
2022	5696743528.970502
2023	5745318430.671948