Year	constant 2015 US$
1960	2133220000
1961	2597370000
1962	3264130000
1963	4095560000
1964	4570960000
1965	5534100000
1966	4551140000
1967	4968880000
1968	4755050000
1969	4154340000
1970	4926180000
1971	4594770000
1972	3889480000
1973	3266480000
1974	4027650000
1975	5108440000
1976	5813280000
1977	4264810000
1978	4253870000
1979	4372580000
1980	5612080000
1981	4951410000
1982	5453210000
1983	4760380000
1984	5274870000
1985	5026460000
1986	4818630000
1987	4386320000
1988	5430550000
1989	6464450000
1990	5878730000
1991	5846380000
1992	5871450000
1993	5372300000
1994	6139260000
1995	4184500000
1996	4580680000
1997	4618060000
1998	4491610000
1999	4009650000
2000	4266460000
2001	6093920000
2002	6546710000
2003	5038350000
2004	5482240000
2005	12625630000
2006	18219130000
2007	9232010000
2008	6920500000
2009	9308630000
2010	10942700000
2011	10448980000
2012	9827020000
2013	10988790000
2014	11580280000
2015	12156140000
2016	11089890000
2017	12557040000