Year	US Dollars
1960	-59086402.3962
1961	-81258028.45309
1962	-96229138.01227
1963	-23039702.5933
1964	-173114795.75747
1965	-174661636.79661
1966	-178100290.11218
1967	-118496923.88492
1968	94555404.93162
1969	42744147.19731
1970	-190948187.99547
1971	-288914038.079
1972	-71365643.8199
1973	-252991286.75899
1974	-957451709.46904
1975	-1787619201.55164
1976	-692414217.57193
1977	439722591.11701
1978	1122021660.64982
1979	464051289.87941
1980	-698119222.1868
1981	512537889.22568
1982	91279141.48267
1983	-5337318.53117
1984	1254451919.27186
1985	374136607.82809
1986	964109781.84377
1987	474773434.32977
1988	-378109452.73632
1989	-2175419149.23098
1990	-2190950085.52325
1991	-1213056903.39656
1992	953013007.69843
1993	4101176225.66878
1994	5829254410.92772
1995	10005446623.0937
1996	9139269997.41134
1997	9307066773.56546
1998	10603026257.2319
1999	12127636906.0303
2000	11523862170.6283
2001	11838926174.4966
2002	12394127611.5189
2003	11110609480.8126
2004	12174074993.7919
2005	7939311030.9663
2006	9006398193.45126
2007	12303586093.6217
2008	10339827156.8771
2009	5056960266.74076
2010	3136237112.45192
2011	-2328473993.33803
2012	-3704257615.33492
2013	-2389933022.63825
2014	-2535388178.97046
2015	-1096867044.0537
2016	-1770948882.95968
2017	1156189972.6204