Year	US Dollars
1960	-13540909.25961
1961	-11668269.72671
1962	-15229910.22142
1963	-19817881.1704
1964	-19172870.19564
1965	-22143655.71986
1966	-28322053.95346
1967	-37072595.66937
1968	-31790214.03294
1969	-31934687.41032
1970	-30976482.53583
1971	-33664163.72957
1972	-50945771.41551
1973	-51891171.4879
1974	-84184905.82029
1975	-127825139.78393
1976	-125973746.44539
1977	-139523354.59544
1978	-167380129.21444
1979	-231379262.37862
1980	-302207690.18874
1981	-361879896.14748
1982	-282908113.1433
1983	-195119141.56603
1984	-119330534.58157
1985	-135900627.02693
1986	-212968997.64053
1987	-245034312.62615
1988	-296170465.02211
1989	-169902127.62489
1990	-144205934.81052
1991	-185528224.93884
1992	-173980880.5985
1993	-237760290.73049
1994	-123794025.51888
1995	-196617154.13693
1996	-83115278.51301
1997	-98883439.49503
1998	-132765175.7313
1999	-465162284.62897
2000	-352258916.4836
2001	-444314998.46188
2002	-339317078.82572
2003	-419992900.89836
2004	-394862770.99019
2005	-382013623.19352
2006	-503738739.74665
2007	-754068506.31006
2008	-769530865.31133
2009	-848605730.40768
2010	-935234222.46541
2011	-1001131465.04909
2012	-854606934.67594
2013	-1204355922.59736
2014	-1201419859.83435
2015	-959845261.5143
2016	-1191858522.78125
2017	-1624936938.57528