Year	current US$
1960	1900000
1961	19400000
1962	35200000
1963	41500000
1964	47300000
1965	46600000
1966	43000000
1967	47800000
1968	51650000
1969	46415000
1970	30660000
1971	39316000
1972	74327000
1973	84834000
1974	227519000
1975	178420000
1976	181418000
1977	171972000
1978	117085000
1979	508593173.1
1980	958789687.6
1981	894651177.9
1982	1004449461
1983	639053164.7
1984	1180562553
1985	1086020331
1986	772872531.5
1987	512289039.7
1988	746219158.9
1989	906548208.8
1990	1204757758
1991	1107119678
1992	1184272084
1993	1095727797
1994	929281012.7
1995	838624597
1996	1848042522
1997	2258785752
1998	1566939366
1999	1716295541
2000	2171803584
2001	1318086348
2002	2402501707
2003	1734065080
2004	3354513579
2005	5279559837
2006	6975744589
2007	5990036001
2008	9323678138
2009	7568396703
2010	6678760512
2011	13275927492
2012	7452584248
2013	9998055386
2014	7998374236
2015	7923931087
2016	6929924460
2017	7801235313
2018	11137967740
2019	5579410047
2020	4009085264