Year	current US$
1990	-405057254.490023
1991	-696716626.86856
1992	-938332376.148888
1993	-916671360.648614
1994	-526728837.974761
1995	-444340676.64157
1996	-659175686.119854
1997	-663541252.185215
1998	-849824296.530214
1999	-1300270700.46775
2000	-309401395.836559
2001	-776509438.85937
2002	-275479511.238032
2003	10356629.3657486
2004	-223673369.476726
2005	1168029098.55697
2006	2463669615.22197
2007	4550883561.81009
2008	3859288299.96883
2009	1246472343.35591
2010	1233133194.65332
2011	-1408823328.7286
2012	2768825958.49635
2013	1516228571.41157
2014	1451686645.73066
2015	1211279189.37795
2016	2625585291.52443
2017	3734914131.08799
2018	2407437645.75206