Year	current US$
1964	140400000
1965	129300000.00000001
1967	138364000
1968	124434000
1969	123524000
1970	109525000
1971	145386000
1973	129789999.99999999
1974	242531000
1975	338402000
1976	314120000
1977	458652000
1978	450516000
1979	551216000
1980	494754000
1981	541516000
1982	321964390.8
1983	372558763.2
1984	392126599.1
1985	395903908.7
1986	596978996.3
1987	681225629.1
1988	524499078.00000006
1989	425807716
1990	479278490
1991	443105908
1992	398244445.1
1993	464757256.90000004
1994	390842287.8
1995	387414266.9
1996	660796276.4
1997	604313059
1998	462492591.3
1999	490307256.3
2000	442636373
2001	412687885
2002	977594023
2003	1274702902
2004	1974039932
2005	2868252950
2006	3358062517
2007	3313479558
2008	3029802519
2009	3354825449
2010	5177970531
2011	6420925641
2012	6225887385
2013	8571831300
2014	7708524567
2015	7729833105
2016	12553699960
2017	13508066167
2018	7406558202
2019	6776116103
2020	6537616367