Year	US Dollars
1960	17784823.63403
1961	-61258749.13546
1962	-73115285.05088
1963	-57306570.49699
1964	9880367.55261
1965	37545697.06551
1966	-11856535.91542
1967	-69163126.1733
1968	-51378322.30017
1969	-16599150.28159
1970	-155972729.9674
1971	-120792079.20792
1972	-32929055.81638
1973	-79232511.13979
1974	-48812302.62255
1975	-976927822.33189
1976	-1803226755.3685
1977	-2256967113.00602
1978	-1813113495.09204
1979	-2045420738.11905
1980	-1883927754.91541
1981	-2151236393.86733
1982	-2146221152.24971
1983	-1154617299.22799
1984	-1348208387.7192
1985	-1242570803.93521
1986	-1268129695.53183
1987	-1021878887.93186
1988	-37146581.23302
1989	-1379120426.00316
1990	-1662334384.81977
1991	-1660037167.20649
1992	-1995360541.11033
1993	-1755914442.41316
1994	-1935637020.53678
1995	-2485677025.76112
1996	-1477672701.61429
1997	-1292630082.92222
1998	-1668098996.29337
1999	-1531207967.85117
2000	-2170940438.54696
2001	-1183657869.59214
2002	-1139912203.97423
2003	-1728624989.55548
2004	-3208676014.88498
2005	-3788296232.3745
2006	-4108542725.90841
2007	-7385471723.44763
2008	-13125040321.0198
2009	-11062913455.2134
2010	-10050254241.3154
2011	-14218964387.6933
2012	-15001158963.4231
2013	-15452620308.1316
2014	-13748141274.9961
2015	-7836916112.77818
2016	-10609635483.0487
2017	-10810255881.1391