Year	constant 2010 US$
1977	6293256747.1666
1978	5952382219.85344
1979	6736270519.95185
1980	7560768364.85015
1981	7541078831.81314
1982	7836421322.98507
1983	7340492065.26549
1984	7661677059.54164
1985	9076859886.78379
1986	8909499144.18819
1987	9817677396.41165
1988	9539563192.60605
1989	9023944401.84947
1990	10594182031.5528
1991	10655711732.225
1992	9335284629.60712
1993	10923981169.5121
1994	10947362499.0004
1995	11731250727.0441
1996	12766180105.0085
1997	12815403865.5463
1998	12257944907.1545
1999	12844938165.1018
2000	13310102572.4853
2001	13065214392.6317
2002	12990148201.0444
2003	14447171267.9765
2004	14002926872.3559
2005	14730207819.014
2006	14775739783.1005
2007	12438842212.7199
2008	13630057015.9808
2009	13750655171.6546
2010	12666502033.1523
2011	14245353878.5935
2012	14957867711.5012
2013	14572691842.9369
2014	15375038981.1823
2015	15770059616.2651
2016	15981721772.1666
2017	16097397580.6085