Year	current US$
1963	237000000
1964	288200000
1965	320700000
1966	340800000
1967	256000000
1968	309800000
1969	451600000
1970	532799999.99999994
1972	766600000
1973	781900000
1974	939800000
1975	932800000
1976	840300000
1977	852100000
1978	714000000
1979	681400000
1980	828600000
1981	688100000
1982	475600000
1983	470026593.7
1984	675654944.6999999
1985	793327698.8
1986	871092561.8
1987	764043611.5999999
1988	763183859.8000001
1989	1200700973
1990	1304072007
1991	1029460493.9999999
1992	809664542.4
1993	782198435.4
1994	969478168.0999999
1995	1350588515
1996	1353198572
1997	984739303.6
1998	866507016.9000001
1999	634626085.5
2000	3465151000
2001	3635210000
2002	5039532000
2003	6551356000
2004	7991866000
2005	9579335000
2006	10992137000
2007	13762138000
2008	17806322000
2009	16866233000
2010	17363438000
2011	23348633000
2012	23776710000
2013	24981209000
2014	21975235000
2015	20709520000
2016	17260524000
2017	13085086000
2018	14972692990
2019	12942679995
2020	11865260018