Year	US Dollars
1960	-33389539.05741
1961	-25042154.29306
1962	-50084308.58612
1963	-50084308.58612
1964	-16694769.52871
1965	-33670033.67003
1966	-42087542.08754
1967	-25252525.25253
1968	-42087542.08754
1969	-25252525.25253
1970	2441077.44108
1971	-32996632.99663
1972	-36555095.90071
1973	-7646176.91154
1974	178410794.6027
1975	-150974512.74363
1976	-60369815.09245
1977	-92703648.17591
1978	-282358820.5897
1979	-142427940.57824
1980	101731969.82056
1981	18398079.11909
1982	-18995801.57854
1983	231967056.94426
1984	-133569648.81007
1985	-203957011.92421
1986	-173553039.6054
1987	-189644986.25204
1988	-200978623.45973
1989	-31043066.04054
1990	-55943769.40413
1991	-293146679.32749
1992	-509041661.32547
1993	-533645635.50679
1994	-331015690.94254
1995	-311260129.57524
1996	-347106372.91609
1997	-653745884.32332
1998	-1094806264.85908
1999	-862182919.27603
2000	-759866903.85704
2001	-430160135.6158
2002	-480760251.04603
2003	-61940672.65511
2004	422223664.31452
2005	329858047.8794
2006	1031307229.5172
2007	987871280.82331
2008	1158213807.1094
2009	488671509.97151
2010	1348610315.39043
2011	1366613810.00432
2012	2541509551.37482
2013	2132066136.03473
2014	436112735.16642
2015	-2044775832.12735
2016	-2520136468.88567
2017	-2586732561.50507