Year	constant 2015 US$
1972	36793574459.26277
1973	35626051322.03348
1974	38957864666.32096
1975	39314983929.208206
1976	40774243219.27534
1977	44280196079.58824
1978	50175367383.35532
1979	44156918776.03345
1980	58611473288.79614
1981	69049910735.24289
1982	72642271281.10074
1983	77343726468.5968
1984	78768030024.83502
1985	82294206197.9805
1986	73416323028.31834
1987	62746562141.10781
1988	60833813978.22848
1989	63140102888.792915
1990	62677824774.88298
1991	60915109073.98386
1992	59503236538.02464
1993	54684024395.368484
1994	55085085472.38663
1995	54461864212.517235
1996	54225588471.67756
1997	55085111353.12295
1998	58734905662.67913
1999	58366985019.28858
2000	69741653013.90623
2001	69706958525.85652
2002	71217308488.37474
2003	77682453149.83507
2004	82687556245.26767
2005	91312551764.52852
2006	98914905941.05617
2007	106010479980.66412
2008	113676179492.37607
2009	103853597086.89029
2010	118029125907.4517
2011	123477813402.7104
2012	134560687472.6644
2013	135696360703.5165
2014	134667939222.84528
2015	132830106034.379
2016	139042878774.63846
2017	141294492235.06223
2018	141077104999.34995
2019	141252691744.67465
2020	132573959814.19968
2021	137949469824.1151