Year	constant 2015 US$
1960	1602010000
1961	4662160000
1962	5132340000
1963	6152750000
1964	5326530000
1965	5611130000
1966	5925020000
1967	5468720000
1968	7067520000
1969	5293240000
1970	5507210000
1971	4836540000
1972	4617280000
1973	4446970000
1974	4320190000
1975	4688530000
1976	4310790000
1977	3857920000
1978	4108760000
1979	4330930000
1980	4705530000
1981	5512850000
1982	5894680000
1983	6277720000
1984	6810850000
1985	7524670000
1986	6940600000
1987	7122080000
1988	6884790000
1989	7564170000
1990	7434010000
1991	8003640000
1992	6851100000
1993	7003970000
1994	7469450000
1995	7240910000
1996	9027870000
1997	6949530000
1998	7256760000
1999	7610220000
2000	6638150000
2001	8404610000
2002	6846830000
2003	7423900000
2004	7685020000
2005	7232320000
2006	7681550000
2007	6763840000
2008	8464320000
2009	8483400000
2010	10422970000
2011	10314810000
2012	9388190000
2013	9252650000
2014	8987700000
2015	10234870000
2016	11386760000
2017	8373490000