Year	current US$
1960	109700000
1961	114500000
1962	121700000
1963	139800000
1964	146400000
1965	141300000
1966	171900000
1967	165300000
1968	251464000
1969	271876000
1970	303137000
1971	315831000
1972	359695000
1973	472386000
1974	600470000
1975	599015000
1976	787322000
1977	1183894000
1978	1019854000
1979	1102491000
1980	1387452000
1981	1172761000
1982	993267000
1983	968281000
1984	1079035000
1985	952757998
1986	1193624277
1987	956321186.9000001
1988	1066218481.0000001
1989	964392620.6999999
1990	1116203000
1991	1009475000
1992	1333783000
1993	1280339084
1994	1618648244
1995	1826001106
1996	1994476185
1997	1948742224
1998	1916640043
1999	2029219481
2000	1737200970
2001	1790226700
2002	2046711294
2003	2351439548
2004	2604135637
2005	3298431193
2006	3334732346
2007	3876508428
2008	5000937253
2009	4155471521.0000005
2010	4733263511
2011	5667651052
2012	5794380550
2013	5567873519
2014	5899207011
2015	5938399701
2016	5694754419
2017	5745287445
2018	6051032054
2019	5833239222
2020	5841573949