Year	current US$
1964	5800000
1965	10100000
1966	20000000
1967	20200000
1968	22700000
1969	23400000
1970	28900000
1971	32700000.000000004
1972	34300000
1973	33997000
1974	58590000
1975	95894000
1976	105025000
1977	112892000
1978	177926000
1979	194866000
1980	243044000
1981	256209999.99999997
1982	276671000
1983	270127000
1984	277645000
1985	298464000
1986	357469000
1987	378858000
1988	396174000
1989	332730000
1990	288340000
1991	306270000
1992	288330000
1993	274367921
1994	237074950.1
1995	284323458.2
1996	322730967
1997	325607699
1998	277544350.7
1999	269045379
2000	364114586
2001	278753207
2002	252878074
2003	261717755
2004	310212617
2005	374393824
2006	567254990
2007	628027766
2008	1142808176
2009	1113930963
2010	1250511976
2011	1530419556
2012	1519202747
2013	1984067776
2014	2195553679
2015	1857005080
2016	1795042916
2017	1782042353
2018	2933307839
2019	3194454574
2020	3475540590