Year	US Dollars
1960	-765357747.62001
1961	-517614381.20316
1962	-20510532.71217
1963	-328168523.39477
1964	-126722746.60725
1965	-101274027.26297
1966	40509610.90519
1967	60764416.35778
1968	-40509610.90519
1969	-182293309.83776
1970	-344331753.45851
1971	-468183792.69633
1972	-356840180.20429
1973	-530410108.10265
1974	430539968.42709
1975	-1443257127.66496
1976	-720495821.12493
1977	-2339153515.96412
1978	-3857888449.02797
1979	-570938779.74723
1980	1693810996.74267
1981	1645117521.66458
1982	871041766.47359
1983	1044102802.3722
1984	-943130433.03768
1985	-1829825549.94232
1986	-6571672245.85283
1987	-2762886288.65979
1988	-4192872472.44201
1989	-5493494480.22079
1990	-926546472.42688
1991	2522600303.14513
1992	696097902.54625
1993	-676804125.08032
1994	-1498769383.04002
1995	-1170000404.92625
1996	2729999523.27896
1997	4610000551.05966
1998	30000468.17276
1999	2612542433.98324
2000	11659962882.009
2001	8032389215.82594
2002	5605022554.65475
2003	9753990996.83443
2004	12291088965.8235
2005	23871596336.0595
2006	31470236580.9274
2007	29962484107.9253
2008	32938440922.3509
2009	-797233281.57649
2010	11320673941.333
2011	20205189712.0701
2012	17511024112.6702
2013	5891959288.58338
2014	-3650895745.78985
2015	-22160843605.3129
2016	-22693960606.0135
2017	-20964315644.3459