Year	current US$
1960	4300200000
1961	4157400000
1962	2842300000
1963	3403000000
1964	4539800000
1965	4098700000
1966	5278800000
1967	5096170000
1968	5660260000
1969	6038730000
1970	5160610000
1971	5804740000
1972	7028320000
1973	13346410000
1974	21912130000
1975	34444260000
1976	36670590000
1977	43831380000
1978	43556540000
1979	39006690000
1980	47289930000
1981	82766552681.40001
1982	79906776820
1983	74581220808
1984	69799926352
1985	58625262412.9
1986	54131581206.4
1987	49900702360.3
1988	55471461121.6
1989	60595653084.1
1990	74003410534.1
1991	75394601951
1992	80967190201.8
1993	71826147950.8
1994	66977503388.9
1995	75406880904.5
1996	79922034274
1997	80113629415.6
1998	81983979499
1999	82646040754.5
2000	96342725833
2001	104445975663
2002	110572712254
2003	123422790638
2004	160411837801
2005	163479947459
2006	179096136574
2007	267845780481
2008	374799166007
2009	338255202014
2010	393134855310
2011	353912684235
2012	378194662258
2013	382840528764
2014	387218170883
2015	323617187637
2016	300961762843
2017	328552860541
2018	342288726022
2019	325852326718
2020	273927026407