Year	constant 2015 US$
1960	332130000
1961	621230000
1962	463380000
1963	605250000
1964	457200000
1965	599500000
1966	531890000
1967	597890000
1968	428430000
1969	699630000
1970	639040000
1971	568430000
1972	537120000
1973	568680000
1974	675730000
1975	708500000
1976	716730000
1977	724580000
1978	803630000
1979	461440000
1980	490470000
1981	556410000
1982	487240000
1983	496250000
1984	442390000
1985	412020000
1986	431820000
1987	473440000
1988	494340000
1989	440710000
1990	539720000
1991	470760000
1992	479910000
1993	324950000
1994	137660000
1995	85670000
1996	145590000
1997	247520000
1998	186860000
1999	329420000
2000	297160000
2001	524450000
2002	291260000
2003	337050000
2004	339930000
2005	368580000
2006	431030000
2007	290650000
2008	320960000
2009	418370000
2010	484530000
2011	770880000
2012	934990000
2013	614630000
2014	793110000
2015	474780000
2016	627440000
2017	751050000