Year	current US$
1970	1730511684.0398
1971	1891731389.2396
1972	2075774509.24483
1973	3150449397.94177
1974	4303197407.83302
1975	3290739990.42909
1976	3324041129.14177
1977	3571153368.13618
1978	3930817609.23324
1979	4561084526.18783
1980	5313320946.55042
1981	5652130778.57871
1982	5905718573.18595
1983	6841839106.4215
1984	5066230520.13659
1985	6089738416.98681
1986	7367961064.45738
1987	7534562468.53776
1988	8904272136.75327
1989	6322370503.49508
1990	11709333040.4409
1991	15390809987.061
1992	18625230986.1304
1993	20867240432.579
1994	24558728011.8803
1995	27230581708.667
1996	26208853561.1399
1997	29882656893.9175
1998	31915218416.2568
1999	32880580525.506
2000	32825922727.9775
2001	31846289273.3006
2002	12802844511.9859
2003	14337962079.1899
2004	16611885516.8676
2005	18624907203.3468
2006	20934971520.4378
2007	25291216058.72
2008	33172025765.5264
2009	36433018867.9566
2010	45007031112.1635
2011	56414221592.8046
2012	63214922640.7733
2013	66083281250.7307
2014	65327275378.0595
2015	71395450685.1198
2016	67992327640.6339
2017	68506424034.2116
2018	58592287422.9834
2019	52517055116.891
2020	44620727930.8203
2021	55632289304.6357