Year	current US$
1976	6463528.71182897
1977	8396296.2962963
1978	12833333.3333333
1979	13407407.4074074
1980	22151851.8518519
1981	23625925.9259259
1982	27748148.1481481
1983	30018518.5185185
1984	38285185.1851852
1985	37974074.0740741
1986	41744444.44444441
1987	45559259.25925924
1988	58866666.66666663
1989	70651851.85185182
1990	77792592.59259257
1991	75855555.5555556
1992	84788888.8888889
1993	84925925.92592591
1994	98299999.99999975
1995	117725925.92592637
1996	112744444.44444442
1997	113951851.85185233
1998	120751851.8518514
1999	137188888.88888937
2000	172038047.89222696
2001	165997923.39460674
2002	163419433.53369933
2003	186772396.4521688
2004	201980431.83327127
2005	226593084.7041738
2006	237872640.4261626
2007	320767543.6938285
2008	291803815.0858588
2009	263494251.38559777
2010	300897098.03289
2011	301921916.6907793
2012	284022861.8718422
2013	294064977.44550353
2014	305515422.9759538
2015	340221809.32577586
2016	349582448.185991
2017	381447093.10003
2018	406552797.741004
2019	449502782.243004
2020	229871208.603302
2021	301925094.062247
2022	449669430
2023	476074570.37037