Year	constant 2010 US$
1968	13276121198.6516
1969	14692543129.9952
1970	13556109783.9204
1971	14325511683.5175
1972	15007741114.6517
1973	16337183701.0373
1974	17684273474.4876
1975	16110233667.4935
1976	14832393652.7798
1977	14518431657.9712
1978	12680710605.2774
1979	11946779894.7449
1980	12366802684.8503
1981	12558430878.2954
1982	12367002675.0556
1983	12723928188.4452
1984	13740213889.9319
1985	14536454791.7867
1986	15157397156.2298
1987	15520666559.1989
1988	15173521672.5531
1989	14553926879.8628
1990	12422679721.1524
1991	9753819939.74293
1992	7065758971.5966
1993	6201739482.11756
1994	5740929459.3505
1995	6393744051.29994
1996	6214719090.84187
1997	4859910390.09021
1998	4160083125.75449
1999	4850657204.41227
2000	4321935534.04981
2001	3710942045.71493
2002	3870874901.55719
2003	3698030799.54016
2004	3857547163.57033
2005	3873752859.97873
2006	3688201727.03918
2007	3952090804.91459
2008	4014615120.76515
2009	3618271906.72122
2010	3498315312.7165
2011	3560774234.30974
2012	3746696985.66414
2013	4123375949.76336
2014	4533056793.84651
2015	5155550877.40179
2016	5601275219.05045
2017	5739876307.37631
2018	5784823312.58029