Year	current US$
1960	319000000
1961	347000000
1962	380900000
1963	367900000
1964	410900000
1965	454200000
1966	490600000
1967	522500000
1968	495900000
1969	536950000
1970	588490000
1971	676630000
1972	892160000
1973	1316520000
1974	1531960000
1975	1400860000
1976	1960160000
1977	1752710000
1978	2288310000
1979	2258760000
1980	2913780000
1981	4695630000
1982	5746840000
1983	5732090000
1984	7133020000
1985	7957920000
1986	7455920000
1987	10237600000
1988	11753020000
1989	11823411000
1990	13384405000
1991	13722289000
1992	14595879000
1993	15345585000
1994	18284501000
1995	21649485000
1996	23100360859
1997	26245506000
1998	27184321000
1999	26587129400
2000	27774906054
2001	31334216363
2002	36059281684
2003	47253986396
2004	63016888939
2005	73306851637
2006	85165833378
2007	106539000000
2008	132027000000
2009	102143000000
2010	113883000000
2011	134907000000
2012	152462000000
2013	161481000000
2014	166505000000
2015	150982000000
2016	149247000000
2017	164495000000
2018	177169000000
2019	180833000000
2020	169638000000