Year	constant 2015 US$
1960	2396721000
1961	3613482000
1962	3828304000
1963	3555150000
1964	4059250000
1965	3907833000
1966	3478214000
1967	4142192000
1968	4437739000
1969	4358013000
1970	3886176000
1971	4239901000
1972	4061929000
1973	4350122000
1974	5107579000
1975	5427541000
1976	5050268000
1977	4841450000
1978	5496276000
1979	6994665000
1980	6957913000
1981	7400229000
1982	7515713000
1983	7719259000
1984	7387110000
1985	7908127000
1986	7359335000
1987	6856780000
1988	7111851000
1989	7780460000
1990	8274979000
1991	9087828000
1992	8946211000
1993	8338209000
1994	7854925000
1995	7504855000
1996	7912950000
1997	7007759000
1998	6734644000
1999	6922101000
2000	7331212000
2001	7389415000
2002	7393454000
2003	7763891000
2004	7756381000
2005	10311472000
2006	10534672000
2007	11187687000
2008	11978261000
2009	10533961000
2010	11817097000
2011	12086286000
2012	11822864000
2013	12342802000
2014	14121837000
2015	17940210000
2016	24473199000