Year	current US$
1976	50352000
1977	57784000
1978	74078859.2402079
1979	89666666.666667
1980	117783333.33333372
1981	120873105.6893436
1982	119946470.5201883
1983	106697626.2783831
1984	90230330.395614
1985	91877092.5838644
1986	118565541.3410905
1987	154611804.4503213
1988	161309746.6883282
1989	160613546.25675887
1990	166356942.6792415
1991	201201041.8334131
1992	209863340.7053362
1993	283730700.6987428
1994	526777427.03792596
1995	591927100.5359654
1996	679470089.2080944
1997	795121771.3259517
1998	432900222.848135
1999	453953027.90796006
2000	409957029.8997577
2001	302714320.30285096
2002	192193635.619579
2003	302404239.1145299
2004	355773590.13716304
2005	271395612.776266
2006	251672519.08867395
2007	339501440.066011
2008	494331205.8484961
2009	600245576.413353
2010	582876388.6951405
2011	775044568.4714538
2012	768790414.1489941
2013	966875835.4863281
2014	1099021542.0939791
2015	1060298852.851578
2016	1065394174.066479
2017	1382902207.309096
2018	1473432598.482038
2019	1506012202.3802478
2020	806752077.1298884
2021	735726753.5005732
2022	1147802766.240745
2023	1516273855.706724