Year	current US$
1970	868290643.310819
1971	892676106.791665
1972	1164432473.96364
1973	1564639765.08903
1974	2001898078.25148
1975	2093163001.65499
1976	2444262433.56219
1977	2789710587.28428
1978	3493247502.50492
1979	4051545319.21011
1980	4510375027.13134
1981	3962350506.16804
1982	4040243361.06486
1983	4079168240.97865
1984	3940693375.31523
1985	4098769205.24742
1986	5862890663.6806
1987	7358015551.50074
1988	8201064492.4106
1989	8664656865.47263
1990	11212056005.447
1991	12292518178.2036
1992	13614977980.5763
1993	13768938604.0643
1994	14699918764.8012
1995	17917088835.8962
1996	17913368543.3627
1997	16733007302.7733
1998	16608561780.2301
1999	17844770492.2251
2000	16485012023.4115
2001	16688519980.0095
2002	17590781537.6846
2003	21183369011.1755
2004	28206071971.2172
2005	30721432311.5675
2006	30368058073.2076
2007	39149258944.9505
2008	40352315126.1801
2009	28539982180.2193
2010	32043330391.131
2011	35685289064.2116
2012	39037926024.9573
2013	39341116045.5376
2014	42190108352.1641
2015	31743520644.1627
2016	34025585998.6231
2017	39389565966.062
2018	42251475535.0094
2019	38530629915.6982
2020	41945173743.5082
2021	49784930446.2352