Year	US Dollars
1960	4899902.00196
1961	3079938.40123
1962	979980.40039
1963	3079938.40123
1964	5039899.20202
1965	9379812.40375
1966	-419991.60017
1967	-7979840.40319
1968	2799944.00112
1969	11339773.20454
1970	10639787.20426
1971	17617449.66443
1972	12358527.38389
1973	31556195.96542
1974	58866813.8337
1975	46247464.50304
1976	22079116.83533
1977	-9889604.41582
1978	-80841766.32935
1979	-149679258.73129
1980	-213790446.84129
1981	-175148334.09402
1982	-189537668.07884
1983	-212727762.31936
1984	-184165932.35274
1985	-130581672.58986
1986	-49409190.37199
1987	-1522593.32024
1988	-23531955.13525
1989	-19369275.93701
1990	-109901673.55931
1991	-131537935.0306
1992	-240812798.03647
1993	-259108241.27062
1994	-130382336.3749
1995	-233298199.66364
1996	-341028213.89529
1997	-254089279.51389
1998	-277581553.09951
1999	-251790261.06883
2000	-238549540.33257
2001	-175781428.95308
2002	-131490005.40761
2003	-33368686.13428
2004	-191930026.62704
2005	-378394194.32956
2006	-342083718.52618
2007	-365599639.48108
2008	-458468007.06919
2009	-523810106.56502
2010	-581792014.97022
2011	-612514508.82098
2012	-481419853.83678
2013	-281586529.39897
2014	-214335704.47907
2015	-19182531.40945
2016	-117673460.23113