Year	current US$
1960	1227300000
1961	1460400000
1962	1347100000
1963	970600000
1964	1056700000
1965	1178700000
1966	1124600000
1967	1095600000
1968	1169600000
1969	1576150000
1970	1684650000
1971	1869420000
1972	1904530000
1973	2241340000
1974	3635180000
1975	3958150000
1976	3032820000
1977	4162609999.9999995
1978	3833920000
1979	6710570000
1980	10540900000
1981	9432180000
1982	5340990000
1983	4504000000
1984	4584630000
1985	3814210000
1986	4724040000
1987	5818860000
1988	5319520000
1989	4200385247
1990	4078479000
1991	8275244000.000001
1992	14862390000
1993	16772937999.999998
1994	22363696103
1995	19221011480
1996	24427616534
1997	30284808496
1998	31999262796
1999	25517783785
2000	25134262015
2001	20220799694
2002	8962406683
2003	13761192150
2004	22183364026
2005	28383971424
2006	33995096052
2007	44508789377
2008	57382480576
2009	38445401087
2010	55938073836
2011	72534984025
2012	68359618483
2013	73991115527
2014	65233830376
2015	59747968189
2016	55852049000
2017	66938066999.99999
2018	65482803000
2019	49125005000
2020	42325164000