Year	current US$
1964	124039964.38401425
1965	127959962.81601487
1966	171359931.45602742
1967	230159907.93603683
1968	250599899.7600401
1969	262359895.056042
1970	315587873.7648505
1971	403759838.4960646
1972	458527816.5888734
1973	513084057.6861769
1974	567839772.8640909
1975	658814496.6365448
1976	694215171.3637089
1977	942444694.1187289
1978	1329989728.805003
1979	1195214806.5049887
1980	1331206342.9129212
1981	1275711804.5231953
1982	1223787059.9895167
1983	1083107207.0899208
1984	1062032243.2378523
1985	1059607839.939309
1986	1421469662.2194536
1987	1564363093.069054
1988	1708414332.48249
1989	1611736676.9867706
1990	1770037635.556146
1991	1551236233.620004
1992	1361184694.9698625
1993	974215540.8738623
1994	1349075187.8994997
1995	1934608654.0860436
1996	1928429597.8488405
1997	2018240803.685333
1998	2209264379.202441
1999	2010672634.3605258
2000	2122912364.7062466
2001	2357162586.506897
2002	2266259612.0729795
2003	2360608674.4671464
2004	2616976828.193165
2005	3503820023.871898
2006	5016460627.675117
2007	6380367095.677802
2008	6771593328.832691
2009	7743820457.131037
2010	9465734746.990753
2011	9706030023.160479
2012	12173250265.62884
2013	12818893339.596786
2014	16309880634.876095
2015	15490333708.965652
2016	14507956795.436068
2017	16321756294.277328
2018	17608920864.349056
2019	19033327725.66538
2020	19448624988.93855
2021	21596544664.494064
2022	21230159921.008907
2023	19068208474.979214