Year	current US$
1978	69973808.29
1979	141358444.2
1980	143553878.8
1981	83575164.79
1982	78817733.76
1983	92136260.99
1984	88956192.02
1985	104192878.7
1986	165114135.7
1987	146404815.7
1988	153433853.1
1989	128585998.49999999
1990	147319821.638922
1991	117331405.1037
1992	145829979.963653
1993	196353628.711016
1994	156338735.387476
1995	99226998.2832575
1996	113292395.012425
1997	104156570.276899
1998	89190341.0894727
1999	84706957.1672205
2000	77579832.3394355
2001	95900828.2948047
2002	96449265.0688453
2003	115156510.420677
2004	110298458.281732
2005	185594146.924044
2007	154763490.178788
2008	277656410.808082
2009	253478346.032984
2010	159042306.767882
2011	239379342.204787
2012	355744067.705881
2013	250455409.726336
2014	280695394.012308
2015	121711150.465094