Year	US Dollars
1965	-194626474.44299
1966	-157349449.60069
1967	-173816895.17912
1968	-232710280.37383
1969	-226634382.56659
1970	-350916855.06154
1971	-421576128.53864
1972	-506980351.6029
1973	-497978777.16018
1974	-1508414710.15998
1975	-2413414949.58352
1976	-1567030983.11817
1977	-1568145763.90107
1978	-2268041085.50637
1979	-3377143285.71429
1980	-2830000277.77778
1981	-3612162837.83784
1982	-3812808497.53695
1983	-3080326076.83353
1984	-4124919587.18555
1985	-4206889749.76442
1986	-3538821328.34425
1987	-4134877847.60409
1988	-6252923736.51334
1989	-5732341749.27716
1990	-5462763885.15029
1991	-2950283183.78198
1992	-1053170041.8259
1993	-1980792316.92677
1994	-2846975088.96797
1995	-3096431731.05279
1996	-3685141509.43396
1997	-4749262536.87316
1998	-8057851239.66942
1999	-7490415806.54674
2000	-6605019815.05945
2001	-4735982580.29396
2002	-3825643403.66334
2003	-2145112916.36046
2004	-1072281522.63976
2005	-2031877154.70579
2006	-1740068558.70121
2007	-5973862163.20382
2008	-9109090909.09091
2009	-12548052513.2371
2010	-11465060590.6683
2011	-9725114894.05649
2012	-22120276920.5105
2013	-18288710327.9248
2014	-25762031126.7303
2015	-28206978232.163
2016	-31063761811.7251
2017	-28685188702.2818