Year	US Dollars
1960	-480589422.69273
1961	-121835810.59788
1962	-4338816.79543
1963	358876812.26082
1964	505013556.1942
1965	-63081483.31758
1966	18564400.27507
1967	658195364.62038
1968	859416849.12396
1969	79867771.45645
1970	2233999712.89119
1971	1648555258.46702
1972	1058605515.70866
1973	1880961803.81962
1974	307454907.97546
1975	-2900999115.21825
1976	-1346548377.28195
1977	-251912929.00799
1978	919244498.99185
1979	1480755933.07154
1980	5144255217.24256
1981	2360497122.36217
1982	12179622274.4589
1983	11083252190.8471
1984	12445371013.8213
1985	8482607103.62505
1986	3686937747.39115
1987	5187028657.61689
1988	4002600146.25823
1989	338682432.43243
1990	1052451148.44018
1991	-3219865584.35891
1992	-2118805328.03839
1993	111619254.32137
1994	6706942003.51494
1995	18801369863.01369
1996	24631463146.3146
1997	12412249024.9892
1998	12198854061.3414
1999	24071481456.55251
2000	41696182075.2811
2001	41723915289.2562
2002	32865608870.1969
2003	34019698808.0794
2004	44973097617.2175
2005	45375474500.74269
2006	35220380818.0536
2007	30973838562.51751
2008	26676663542.6429
2009	-20248447204.96889
2010	-30927151055.3396
2011	-21452593814.6324
2012	-35937169851.3652
2013	-30342886074.2142
2014	-17701756155.2091
2015	-38550606774.3054
2016	-37109562016.3723
2017	-37600082413.4421