Year	current US$
1960	83300000
1961	93000000
1962	103100000
1963	110800000
1964	122400000
1965	149000000
1966	161100000
1967	142800000
1968	171800000
1969	155323000
1970	171639000
1971	187809000
1972	189309000
1973	218390000
1974	284108000
1975	310793000
1976	355238000
1977	351611000
1978	455425000
1979	571835000
1980	722078000
1981	737708000
1982	786217000
1983	878976000
1984	928758000
1985	988532000
1986	1101642512
1987	1109717000
1988	1087870000
1989	960186000
1990	1077571000
1991	504964439.59999996
1992	709295272.1
1993	770400000
1994	1034385361.0000001
1995	1152991664
1996	1121896665
1997	1162392286
1998	1459683362
1999	1673614933
2000	1592143483
2001	2095348904.9999998
2002	1933235470
2003	2832672502
2004	3579385388
2005	5170149348
2006	5604925776
2007	6318619301
2008	8018562516
2009	8672584154
2010	9228117368
2011	9556392653
2012	12694281821
2013	12688771548
2014	18973054469
2015	24410694580
2016	24197053631
2017	23341340211
2018	24518798916
2019	24266636890
2020	21652205861