Year	current US$
1961	71100000
1962	67900000
1963	83300000
1964	86900000
1965	101900000
1966	107100000
1967	114400000
1968	72700000
1971	119318000
1972	120355000
1973	135231000
1974	170079000
1975	178592000
1976	181950000
1977	204077000
1978	232659000
1979	257403000.00000003
1980	342600000
1981	354950000
1982	386516000
1983	415419000
1984	455398000
1985	487646500
1986	491594377.09999996
1987	671797435.9
1988	537180600
1989	588011600
1990	594662200
1991	510117213.1
1992	562240800
1993	588822434.1999999
1994	910975857.1
1995	692828381.3000001
1996	638647787.8
1997	1310197735
1998	1361675114
1999	3224314297
2000	882954240
2001	775274630
2002	711383057
2003	709804742
2004	1401588495
2005	937907157
2006	1119434815
2007	1202036410
2008	3152877259
2009	1810114296
2010	2166719040
2011	1776196640
2012	1326211822
2013	1140111152
2014	1320541119
2015	1748341098
2016	1732977982
2017	1345765125
2018	1225369368
2019	1364675582
2020	959088103