Year	US Dollars
1990	-1057594258.87656
1991	-1158706025.89737
1992	-1238320354.73674
1993	-1265580816.92879
1994	-1037990435.82326
1995	-916141420.00067
1996	-779955470.62494
1997	-727769359.8912
1998	-1179563669.97698
1999	-1001271417.83162
2000	-688664600.6383
2001	-444117758.8113
2002	-244161183.08747
2003	-495328956.80838
2004	-822714926.57721
2005	-889455780.06229
2006	-1471074476.47576
2007	-2744760293.34103
2008	-3322643061.12187
2009	-2544253446.42928
2010	-3261262346.06291
2011	-5177440604.59741
2012	-4622696852.38914
2013	-5959509158.07509
2014	-5002391176.51554
2015	-1438613035.35838
2016	-1491043104.80277