Year	US Dollars
1990	1814093220.33898
1991	980443478.26087
1992	724663620.28302
1993	36181164.02116
1994	188714604.65116
1995	-478588354.22564
1996	-268309135.97734
1997	-236221938.77551
1998	-374680611.65609
1999	-983310217.53461
2000	-746134847.18037
2001	-217282329.71372
2002	232807381.54614
2003	-94071502.95036
2004	-497969606.37768
2005	-231748041.2884
2006	-18936896.2489
2007	-624453736.6548
2008	-1071041306.57683
2009	938984579.04974
2010	688946927.76782
2011	941498371.77387
2012	1955167557.89542
2013	2674937846.55014
2014	3692465046.76309
2015	3698941220.4466
2016	4093505866.73575
2017	4709958019.53032