Year	US Dollars
1970	-68141046.77519
1971	-61986923.96921
1972	-61777227.72277
1973	-62256663.95065
1974	-99436128.74485
1975	-59993528.95236
1976	-58480763.40503
1977	-84485615.53319
1978	-55387100.36761
1979	-52369461.07784
1980	-68424185.9309
1981	-99910634.99112
1982	-184705312.5
1983	-161486647.47344
1984	-154890958.18977
1985	-163786694.72914
1986	-136184618.7459
1987	-155641898.60835
1988	-192014921.49994
1989	-218934959.34959
1990	-326456841.82088
1991	-288586055.77689
1992	-209909139.85732
1993	-251440651.31948
1994	-293208110.87129
1995	-324416342.41245
1996	-334206765.12625
1997	-180180180.18018
1998	-103326334.40159
1999	-95027981.05898
2000	-309817754.2622
2001	-72116760.46933
2002	206217206.2172
2003	47456469.78491
2004	-80592924.76333
2005	-156323840.31837
2006	-228076778.32141
2007	44483985.76512
2008	-22264537.86436
2009	-128230063.90664
2010	-79602649.00662
2011	213606894.63442
2012	427675318.00077
2013	636869622.94211
2014	1338837070.45244
2015	746600643.22946
2016	1206696681.41593