Year	US Dollars
1960	-51428562.85714
1961	-37142857.14286
1962	-59999991.42857
1963	-25714277.14286
1964	-5714294.28571
1965	-8571428.57143
1966	-45714285.71429
1967	-11428571.42857
1968	-22857142.85714
1969	-35211267.60563
1970	-14404033.12928
1993	-420854953.47713
1994	-359651679.64484
1995	-529889412.43676
1996	-646408625.18926
1997	-402905994.6034
1998	-410123184.71778
1999	-460354834.57796
2000	-435453284.89881
2001	-345053597.75739
2002	-379079535.02681
2003	-467682005.02639
2004	-389641935.81157
2005	-545136102.62676
2006	-540354296.27734
2007	-657982410.51089
2008	-231236706.57154
2009	-696606647.95947
2010	-611372086.92828
2011	-695403685.49957
2012	-677130205.03347
2013	-802608810.05649
2014	-735797437.25077
2015	-799111092.32377
2016	-878130543.86994
2017	-759315949.81459