Year	current US$
1960	373000000
1961	468600000
1962	536700000.00000006
1963	556900000
1964	578800000
1965	728900000
1966	817200000
1967	813400000
1968	630100000
1969	601770000
1970	618880000
1971	752660000
1972	797600000
1973	1025720000
1974	1531590000
1975	2416430000
1976	1921810000
1977	1758130000
1978	1419950000
1979	1852080000
1980	2871350000
1981	3765840000
1982	3301430000
1983	2238480000
1984	1641600000
1985	1566220000
1986	1914960000
1987	3374770000
1988	2320040000
1989	2520100000
1990	3171894000
1991	2723502100
1992	4118419799.9999995
1993	4409345600
1994	6121101800
1995	8292161899.999999
1996	8385053599.999999
1997	9011396900
1998	8758662000
1999	7323230200
2000	7691545062
2001	7574788527
2002	7774437699
2003	8636734090
2004	10251611447
2005	12664370853
2006	15591292537
2007	20582982081
2008	29920647170
2009	23175908285
2010	31933043844
2011	40290775477
2012	45098673670
2013	46290022963
2014	44886803142
2015	40176781469
2016	37694340800
2017	41861625586
2018	45697167133
2019	44470220270
2020	37810586473