Year	current US$
1966	112500000
1967	144762000
1968	108565000
1969	114655000
1970	149699000
1971	162424000
1972	178681000
1973	193465000
1974	288421000
1975	331209000
1976	399219000
1977	461282000
1978	478456000
1979	507149000
1980	534890999.99999994
1981	477402000
1982	428303000
1983	411596000
1984	363184000
1985	284400000
1986	258725000.00000003
1987	307740000
1988	290717000
1989	322988000
1990	4258639387
1991	5036406815
1992	5767100697
1993	5170537928
1994	6056179453
1995	5682960055
1996	3819897441
1997	3783079932
1998	5980361335
1999	3596791216
2000	4117960237
2001	3309297510
2002	1847093244
2003	1687490660
2004	1691452436
2005	1411408391
2006	1427566814
2007	2671498936
2008	3311178039
2009	2292644688
2010	2611310768
2011	2639341875
2012	2059040775.9999998
2013	2104223426
2014	2272996190
2015	2444723640
2016	1941328003
2017	1978316175
2018	1156560855
2019	1888413990
2020	1571994615