Year	US Dollars
1960	-4065610.54255
1961	-5037078.49447
1962	-6028319.08033
1963	-6990074.09479
1964	-8225289.27924
1965	-8655591.23272
1966	-11157601.11576
1967	-15341701.53417
1968	-26429567.64296
1969	-23046929.39702
1970	-34896705.75098
1971	-36073825.50336
1972	-38291509.55662
1973	-56476012.102
1974	-72994849.15379
1975	-71737660.58147
1976	-59280128.79485
1977	-83135391.92399
1978	-97198744.26467
1979	-91226993.86503
1980	-141984045.29079
1981	-234373132.54452
1982	-149315334.56346
1983	-5652292.82523
1984	35351201.47874
1985	167875538.73647
1986	267415251.98233
1987	524480314.49163
1988	703242918.0794
1989	403618045.56057
1990	199516259.07014
1991	256306885.63514
1992	273996302.79187
1993	332115884.61062
1994	317924458.01982
1995	334824327.24912
1996	809638409.24132
1997	660512764.32563
1998	-156298066.68402
1999	628795086.9302
2000	679485671.72371
2001	537440936.79381
2002	678719302.12712
2003	887844461.50427
2004	737177438.25779
2005	1722233093.29994
2006	1840506459.23997
2007	1523539535.41409
2008	-587528746.57604
2009	-1754049559.05578
2010	-975476919.4536
2011	-559503963.03121
2012	-1752569201.08674
2013	11321654.15326
2014	1119307365.4134
2015	-190838142.43999
2016	2048391262.00762