Year	US Dollars
1960	-148623522.11221
1961	-94336011.88119
1962	38426764.35644
1963	141505730.69307
1964	3653726.73267
1965	-20171392.73927
1966	-89504575.57756
1967	-178485510.23102
1968	-261589867.9868
1969	-294433623.76238
1970	-300301791.41914
1971	244757894.38944
1972	247261280.52805
1973	3461654472.86664
1974	10783896082.8096
1975	2773055992.72364
1976	6107914245.41008
1977	1372240187.59121
1978	978445643.13586
1979	9660039875.13303
1980	-14164364820.1188
1981	-15651420598.0482
1982	-4890560840.47744
1983	-15108728819.8744
1984	-8612447582.20714
1985	-9739286227.53126
1986	-13970909214.8922
1987	576180378.85584
1988	-8630857567.00567
1989	-9977684993.80531
1990	-13134204728.1557
1993	3046536574.05406
1994	10749816311.4139
1995	7914318073.47338
1996	6223632673.10775
1997	2171645134.44864
1998	-4258296496.44417
1999	4210835499.52061
2000	1837707919.21131
2001	-2447396907.3724
2002	842657774.56647
2003	-2186723105.71526
2004	-1482340333.67095
2005	14087911597.6982
2006	17497733976.5903
2007	27290477619.8252
2008	19998393809.12889
2009	7135886373.51815
2010	24493086439.7137
2011	47115392944.21639
2012	5297887134.11093
2013	16043156838.7569
2014	7287454065.53246
2015	1811571218.3908
2016	6676797604.25627
2017	6598759504.31845