Year	US Dollars
1960	-10610121.18858
1961	7918070.40657
1962	9831516.11445
1963	-4058241.79251
1964	-6293171.98765
1965	6693953.37629
1966	-6368446.40499
1967	-48506768.48357
1968	-37024738.34897
1969	8476345.50078
1970	8995227.27273
1971	-42373181.81818
1972	-14699184.22842
1973	-23016087.87307
1974	-144606603.30165
1975	-115615159.40143
1976	6407092.27645
1977	-16565293.91059
1978	73693150.38176
1979	33055473.6245
1980	660246.79006
1981	-50162772.3485
1982	-148620977.20925
1983	59283341.65231
1984	-814934.82932
1985	5452503.99323
1986	151915193.58119
1987	-55950666.02546
1988	-53225282.46617
1989	126336724.99816
1990	83677920.79446
1991	-83698074.28601
1992	-5257637.81607
1993	193929040.34129
1994	324453137.06315
1995	253609172.42861
1996	44561440.6015
1997	34832010.18838
1998	-369962900.74593
1999	-406023236.23459
2000	-621849344.91706
2001	-71534719.15717
2002	141145349.69349
2003	-338163615.74261
2004	-736087835.1714
2005	-1982406802.29336
2006	-2925543928.46965
2007	-1952813895.87074
2008	-386466984.43055
2009	1160516823.25232
2010	1351610919.95518
2011	1167730433.34746
2012	849141055.58192
2013	1231337590.85898
2014	1074044859.35048
2015	1242255966.18223
2016	1286390407.94409
2017	983880036.23059