Year	current US$
1960	127500000
1961	113600000
1962	135100000
1963	146600000
1964	163800000
1965	194700000
1966	208400000
1967	274500000
1968	308200000
1969	328402000
1970	368594000
1971	421881000
1972	392259000
1973	542722000
1974	625125000
1981	1598220800
1982	975092250.5
1983	800698162.9000001
1984	1012897683
1985	1425713903
1986	1057641662
1987	1204755666
1988	1396322855
1989	1468583810
1990	1722857013
1991	1846698066
1992	2632457378
1993	1450831352
1994	1450546468
1995	1891133352
1996	2078384332
1997	2524421798
1998	2230347574
1999	2238873559
2000	2370280994
2001	2658859321
2002	2900725000
2003	3639881667
2004	3709968749
2005	4572779818
2006	7246957611
2007	14226068575
2008	19079618422
2009	23968305445
2010	18181365529
2011	20834623630
2012	28805748553
2013	26814177231
2014	28813499496
2015	21584509028
2016	14373607315
2017	15490302155
2018	13839860660
2019	14719794727
2020	10785063520