Year	constant 2015 US$
1960	132650000
1961	162210000
1962	177990000
1963	165870000
1964	108560000
1965	138840000
1966	163190000
1967	181430000
1968	272310000
1969	229300000
1970	239840000
1971	243830000
1972	228150000
1973	289730000
1974	473190000
1975	456320000
1976	476140000
1977	341980000
1978	372770000
1979	451720000
1980	456420000
1981	572010000
1982	475030000
1983	815110000
1984	923800000
1985	1769130000
1986	1280210000
1987	1076130000
1988	1563490000
1989	1162260000
1990	1411070000
1991	1503580000
1992	1505080000
1993	1460620000
1994	1391960000
1995	1050250000
1996	979510000
1997	756060000
1998	879730000
1999	852570000
2000	963300000
2001	1560500000
2002	1800050000
2003	1978390000
2004	2035650000
2005	2124430000
2006	2108980000
2007	2470040000
2008	3097960000
2009	3677880000
2010	3331350000
2011	3173700000
2012	2998980000
2013	3554010000
2014	3231880000
2015	3188940000
2016	4073520000
2017	4054070000