Year	constant 2010 US$
1960	890637393.41384
1961	1114569015.58066
1962	1124747720.8431
1963	931352214.776503
1964	829565109.58137
1965	809207660.8801
1966	1148552808.84979
1967	802338325.636177
1968	831189532.596722
1969	910873818.547354
1970	1013913843.13822
1971	1159543744.86456
1972	1386231799.15223
1973	1597807316.65427
1974	4489797343.57175
1975	5553170398.46353
1976	7945047630.27167
1977	6205757221.91544
1978	2360303499.31513
1979	2915345765.87064
1980	2991626894.9057
1981	4373056461.59104
1982	4076225564.87374
1983	3889682156.15495
1984	4092611134.38512
1985	4485864804.84877
1986	3751665242.46842
1987	1759558110.60037
1988	3425214278.9316
1989	2213942549.26322
1990	2213942549.26322
1991	2617947676.12546
1992	2288345278.33544
1993	2324161305.66091
1994	2321249489.33511
1995	2432835056.90676
1996	2844159160.64789
1997	3683181572.96545
1998	4209760533.25659
1999	2578025387.11876
2000	2364813875.71014
2001	2618563611.02804
2002	3217497574.01471
2003	2658519982.17198
2004	2676719485.47574
2005	2764901043.47902
2006	2995658646.26831
2007	3358540450.52321
2008	3600199172.77577
2009	3297173773.76581
2010	4264659463.89596
2011	4968579969.39846
2012	6055639772.65524
2013	6173515946.28597
2014	7006185382.008
2015	6047954842.75491
2016	6000204190.42062
2017	5307449992.04767