Year	current US$
1990	-668985711.8441292
1991	-1844059233.9716902
1992	-2465227635.3039136
1993	-3974955537.0524564
1994	2967331440.466278
1995	451453459.2592593
1996	-579907155.9954454
1997	-518178035.5761794
1998	-1237561678.2718632
1999	-177631147.667286
2000	714234000.6211176
2001	88820109.66862293
2002	-77859849.39287391
2003	-177205093.4811075
2004	127348773.80394676
2005	839983778.8593297
2006	84056640.78888163
2007	-1584076846.6715412
2008	-1499153146.9204886
2009	-2870147866.4177413
2010	-1358500505.4874995
2011	-778433722.1702536
2012	-4118662872.9417114
2013	-3149430281.074038
2014	-2969370270.836242
2015	-5744599652.9184065
2016	-7211831620.06994
2017	-6865167639.592401
2018	-8943024278.749575