Year	US Dollars
1960	-9925840000
1961	11399011.49841
1962	6113497.64238
1963	-6300400.70787
1964	-842562.37675
1965	1629803.0408
1966	16561119.74028
1967	23917392.98515
1968	31258491.61855
1969	36277845.9505
1970	27549581.39037
1971	19887674.34217
1972	2684983.70813
1973	506033.93973
1974	208047484.32415
1975	-63505545.86308
1976	4816076.96992
1977	-85469459.62568
1978	-106356607.1173
1979	-233941419.20708
1980	-60109922.11269
1981	-64769803.64809
1982	-69992592.04708
1983	-9709622.21767
1984	-15104470.07678
1985	-66330870.11394
1986	-124167692.7826
1987	-117123810.54421
1988	-123217115.96713
1989	-124103362.51439
1990	-193153820.47183
1991	-129638815.64045
1992	-156041822.60274
1993	-95111440.56454
1994	-36415404.0843
1995	-65110910.70311
1996	-159123524.78456
1997	-237291888.35324
1998	-216119339.07143
1999	-159818343.40833
2000	-171129291.80367
2001	-195624580.83716
2002	-185193402.98731
2003	-263570682.08671
2004	-373945241.65753
2005	-393645069.91039
2006	-394654150.26982
2007	-418188905.01074
2008	-520147930.3617
2009	-493633071.31105
2010	-544005677.6309
2011	-634595541.19272
2012	-534905982.46401
2013	-800519006.55817
2014	-825813027.51737
2015	-1037733821.73795
2016	-876865446.38
2017	-916061997.31109