Year	US Dollars
1986	-2626712900.10552
1987	-3224355546.61455
1988	-2811845874.31865
1989	-642278756.87323
1990	-597889875.68303
1991	-491903978.43383
1992	-403134977.73411
1993	-1155534898.62757
1994	-1538569710.52678
1995	-1886069295.68084
1996	-2704621716.25444
1997	-2184827720.76943
1998	-1987563953.43684
1999	-818893985.62893
2000	-1114137105.73466
2001	-598816189.232
2002	-2531137966.89682
2003	-4343434968.1013
2004	-6157479968.81748
2005	-1911038475.91305
2006	-1911499445.11309
2007	-10504854821.0585
2008	-13525433605.7906
2009	-10059253563.6788
2010	-9521076296.44096
2011	-5601579736.4668
2012	5458853466.48742
2013	3695048978.7938
2014	6098212596.93588
2015	1528696707.59174
2016	5258354036.6226
2017	6270963635.06861