Year	current US$
1971	5442016.5304
1972	3328816.1415
1973	8154453.9926
1974	97428899.13769999
1975	393475239.7535
1976	508710775.7879
1977	598767457.0771999
1978	820846575.9223
1979	1157452493.8102
1980	1396799296.3339002
1981	1060203989.6274999
1982	965126884.6724004
1983	905502249.3651999
1984	824800003.8377999
1985	814792926.1267
1986	1121131745.0788999
1987	1186328682.9699998
1988	1123218991.1927001
1989	995257543.2019
1990	1148811146.2207603
1991	1159425578.1369274
1992	1158803955.1827958
1993	1101399842.7113569
1994	912488044.8506502
1995	1056652615.6152422
1996	1175450892.4113069
1997	1157451424.804095
1998	1167463055.6380525
1999	1419954729.7354736
2000	1540497856.4784563
2001	1650239859.9428167
2002	1919239489.0553827
2003	2016001475.2928667
2004	2409036546.3703637
2005	2572449427.3366194
2006	3054264237.6153035
2007	3592901161.198456
2008	4371139758.204978
2009	4955353006.53468
2010	6274375346.836513
2011	6655936817.836618
2012	7148430310.919446
2013	8416120623.420969
2014	8334641295.361322
2015	10453778647.724794
2016	8865850458.499907
2017	9105755742.330072
2018	10238475581.413807
2019	9909137956.580187
2020	9456736044.487583
2021	8762412938.774794
2022	9517974234.534018