Year	current US$
1972	1987689763.47792
1973	2880658617.5436254
1974	5825654749.377384
1975	11034541789.64904
1976	18673543960.505516
1977	24051016258.941906
1978	25925065453.48866
1979	36178105862.256035
1980	47680171641.98874
1981	52595929596.83054
1982	48880657334.47192
1983	43503308136.22166
1984	44135011017.58314
1985	42473057127.21087
1986	35039898627.9862
1987	39263304905.830605
1988	40393320289.04869
1989	45436842777.28023
1990	55495216417.87327
1991	54417098146.05297
1992	57494227394.58978
1993	58111255411.085785
1994	62096213379.292885
1995	68760750299.50111
1996	73557830180.77516
1997	81214339387.73027
1998	80926293897.68489
1999	79671865462.33093
2000	98424973047.7077
2001	105599045563.76831
2002	107622937091.72699
2003	121688462672.03389
2004	147125913781.42712
2005	172049400253.2251
2006	208706760111.2035
2007	244207313021.9354
2008	282949443992.74915
2009	277083140716.7979
2010	288832849595.53436
2011	318235429319.38727
2012	362265237162.4492
2013	401300072137.7551
2014	419037386143.1565
2015	412573615047.21063
2016	399842873697.1104
2017	381719728589.597
2018	405354464277.53394
2019	425706852883.7897
2020	386387290097.3427
2021	408245446642.24384
2022	464105390048.7902
2023	507149027212.8707