Year	constant 2010 US$
1981	146393010979.845
1982	129736680677.705
1983	105120308858.824
1984	86798971571.8367
1985	94074859500.4315
1986	73328624058.9191
1987	58734526707.1623
1988	67133123021.9135
1989	67676974031.354
1990	78439809232.9759
1991	85778170323.7621
1992	87608447237.5426
1993	75657622528.0918
1994	77020618596.1676
1995	81904941938.5192
1996	94302984909.7596
1997	96660164522.3181
1998	92248846591.3163
1999	101545363611.053
2000	109035987863.501
2001	126509938906.22
2002	132113043224.208
2003	147575292029.66
2004	179489818018.279
2005	188431667848.9
2006	206258411865.205
2007	251713691988.909
2008	248831388992.074
2009	282572309093.321
2010	289056150316.564
2011	271824655357.874
2012	310576461351.201
2013	310437693323.761
2014	334908766747.71
2015	324613167458.56
2016	302278859409.605
2017	293438124354.142