Year	current US$
1971	1240361281.50898
1972	1501910459.24875
1973	1699778127.13698
1974	1893303306.74996
1975	2546854211.15706
1976	2635037216.71547
1977	2684575534.70266
1978	3004911040.17274
1979	3779301178.74899
1980	4140191207.10113
1981	3745442689.88955
1982	3731391384.29692
1983	3347872044.51235
1984	3269036146.97465
1985	3616327207.20986
1986	5138687239.30433
1987	6180052219.32158
1988	6083534046.27359
1989	6023583878.0484
1990	6992239587.75992
1991	6798865308.64966
1992	7276931812.9222
1993	6719370857.3596
1994	4512609035.91112
1995	5573230477.50686
1996	5845457256.67271
1997	5303613821.3687
1998	5715371856.58755
1999	5766407659.80873
2000	5258503149.61677
2001	5755956988.64533
2002	6168121210.00344
2003	7763168015.83177
2004	8945749982.24865
2005	9774658471.66798
2006	10380640230.5691
2007	12459328480.2776
2008	15095615649.4574
2009	14300887187.1336
2010	14339035934.4364
2011	15586284231.9574
2012	15321593739.7761
2013	16449301327.0265
2014	17245451501.5829
2015	15503087529.9722
2016	16551134292.744
2017	18404630534.6997
2018	20196827765.0533
2019	20296897126.0775
2020	21283050736.1162
2021	23712074299.791