Year	US Dollars
1981	-79407032.86601
1982	-50046339.20297
1983	-60682570.08532
1984	-45379602.7322
1985	-67801188.54673
1986	-80447889.75022
1987	-55158987.67034
1988	-85378151.2605
1989	-127202162.91645
1990	-104792787.09269
1991	-137321349.63902
1992	-107441685.73478
1993	-124070646.54767
1994	-148812055.66021
1995	-115857776.21187
1996	-120878196.50067
1997	-152896230.72991
1998	-77664257.82872
1999	-30941898.67923
2000	-63274971.01535
2001	-77605153.46722
2002	-35576695.11617
2003	-17532874.13901
2004	-42900851.06952
2005	-84994488.63863
2006	-96353242.6572
2007	-115469811.81391
2008	-139299294.00225
2009	-109391061.45251
2010	-216758137.51627
2011	-107702616.04701
2012	-15600010.87666
2013	-110199997.26106
2014	-122478597.48078
2015	-95192868.96534