Year	constant 2015 US$
1960	301160000
1961	266120000
1962	240640000
1963	139030000
1964	319910000
1965	553560000
1966	475880000
1967	487890000
1968	481420000
1969	549990000
1970	654570000
1971	564230000
1972	404900000
1973	338940000
1974	275960000
1975	289950000
1976	171290000
1977	130930000
1978	107090000
1979	61220000
1980	71420000
1981	91690000
1982	81880000
1983	108250000
1984	81410000
1985	78710000
1986	109460000
1987	106290000
1988	161540000
1989	478930000
1990	346550000
1991	345630000
1992	325240000
1993	391620000
1994	249400000
1995	236780000
1996	226660000
1997	254970000
1998	264580000
1999	193880000
2000	231930000
2001	232420000
2002	397930000
2003	373320000
2004	628100000
2005	6372390000
2006	11278060000
2007	1830350000
2008	1234100000
2009	1597350000
2010	1991920000
2011	1671490000
2012	1784120000
2013	2329130000
2014	2252790000
2015	2401490000
2016	2498190000
2017	3308550000