Year	constant 2015 US$
1960	56110000
1961	69500000
1962	57980000
1963	107090000
1964	124500000
1965	113490000
1966	97720000
1967	85980000
1968	66730000
1969	69170000
1970	125940000
1971	131140000
1972	151820000
1973	159140000
1974	135890000
1975	158110000
1976	173350000
1977	250590000
1978	206810000
1979	322010000
1980	354500000
1981	405330000
1982	460900000
1983	463710000
1984	462330000
1985	540430000
1986	554680000
1987	567280000
1988	619820000
1989	762960000
1990	586800000
1991	580950000
1992	536840000
1993	454420000
1994	533610000
1995	458980000
1996	449660000
1997	499930000
1998	521720000
1999	442690000
2000	498680000
2001	536430000
2002	447600000
2003	547430000
2004	456930000
2005	446060000
2006	544200000
2007	585540000
2008	634950000
2009	805170000
2010	756080000
2011	773920000
2012	685790000
2013	783350000
2014	784500000
2015	1212450000
2016	1063350000
2017	1242800000