Year	current US$
1980	-23128901.209705
1981	3685680.83471478
1982	20495648.3395766
1983	49619952.9144072
1984	69149064.5337273
1985	46052332.4118175
1986	-13792404.1232935
1987	1737177.54918285
1988	74384364.96546
1989	45981355.8729639
1990	56431052.0572596
1991	126784921.160374
1992	-151112999.045366
1993	-119323803.083324
1994	-170027745.939057
1995	-186569877.671483
1996	-134662235.564355
1997	-241432110.736621
1998	-73026772.9595623
1999	-182124200.577875
2000	-98297916.1678343
2001	-132920550.627533
2002	-243904468.605717
2003	-298393002.831229
2004	-268713217.483721
2005	-391742205.743397
2006	-327609768.293411
2007	79105978.7229548
2008	-126192718.790724
2009	-259641620.145145
2010	-111421586.291931
2011	-629505946.094087
2012	-1183681680.05842
2013	-482836030.155756
2014	-526688683.381064
2015	-988455422.998959
2016	-1223063295.93781
2017	-973942524.559733