Year	constant 2015 US$
1960	199050000
1961	565930000
1962	422380000
1963	480950000
1964	476910000
1965	550370000
1966	395770000
1967	268090000
1968	436720000
1969	390630000
1970	373410000
1971	401080000
1972	386390000
1973	436250000
1974	477450000
1975	431650000
1976	530000000
1977	494580000
1978	665960000
1979	814310000
1980	847280000
1981	1024980000
1982	1131390000
1983	929450000
1984	1010430000
1985	1038570000
1986	882130000
1987	936010000
1988	1271600000
1989	1642230000
1990	1643770000
1991	1199300000
1992	1111990000
1993	1171300000
1994	827260000
1995	783400000
1996	682110000
1997	559410000
1998	528840000
1999	385910000
2000	672340000
2001	664040000
2002	521160000
2003	625530000
2004	714630000
2005	803920000
2006	989190000
2007	1292910000
2008	1295710000
2009	1753410000
2010	1594580000
2011	2286340000
2012	2491000000
2013	3063500000
2014	2444750000
2015	2464160000
2016	2187740000
2017	2437480000