Year	constant 2015 US$
1960	1316760000
1961	3863820000
1962	3439040000
1963	4481070000
1964	4637240000
1965	5399440000
1966	4863630000
1967	4488800000
1968	5655230000
1969	4367880000
1970	4894340000
1971	4246560000
1972	3991630000
1973	3843970000
1974	3922100000
1975	3969470000
1976	4046570000
1977	3607010000
1978	3947850000
1979	4195510000
1980	4564460000
1981	5292250000
1982	5706180000
1983	6035100000
1984	6538910000
1985	7174150000
1986	6519570000
1987	6730370000
1988	6362290000
1989	6869320000
1990	6786780000
1991	7310120000
1992	6168260000
1993	6194480000
1994	6879480000
1995	6748510000
1996	8516190000
1997	6517960000
1998	6853210000
1999	7294190000
2000	6341430000
2001	7976470000
2002	6563940000
2003	7049810000
2004	7413730000
2005	6870360000
2006	7362690000
2007	6420360000
2008	8128990000
2009	8190800000
2010	9995360000
2011	10001950000
2012	9031710000
2013	9050800000
2014	8612380000
2015	10136780000
2016	11143960000
2017	8176310000