Year	US Dollars, Monthly Level
1971-01-01	-343537000.000000
1972-01-01	-241129000.000000
1973-01-01	6962000.000000
1974-01-01	-4690324000.000000
1975-01-01	-3540396000.000000
1976-01-01	-2254679000.000000
1977-01-01	96763000.000000
1978-01-01	-1024202000.000000
1979-01-01	-2839484000.000000
1980-01-01	-2822768000.000000
1981-01-01	1202455000.000000
1982-01-01	780073000.000000
1983-01-01	6470389000.000000
1984-01-01	13089515000.000000
1985-01-01	12485520000.000000
1986-01-01	8304299000.000000
1987-01-01	11173098424.000000
1988-01-01	19184111221.000000
1989-01-01	16119186972.000002
1990-01-01	10752394001.000000
1991-01-01	10579968651.000000
1992-01-01	15238894793.000000
1993-01-01	13298748120.000000
1994-01-01	10466478730.000000
1995-01-01	-3465613793.000000
1996-01-01	-5599038998.000000
1997-01-01	-6537344746.000000
1998-01-01	-6520303962.000000
1999-01-01	-1235735017.000000
2000-01-01	-872772226.000000
2001-01-01	2683657057.000000
2002-01-01	13150325491.000000
2003-01-01	24705097854.000000
2004-01-01	33587678897.000004
2005-01-01	45224465081.000000
2006-01-01	46515241409.000000
2007-01-01	40046499782.000000
2008-01-01	24660269300.000000
2009-01-01	25098426484.000000
2010-01-01	20013367657.000000
2011-01-01	29692084729.000000
2012-01-01	18910586167.000000
2013-01-01	2286330124.000000
2014-01-01	-4153442086.000000
2015-01-01	19512087580.000000
2016-01-01	47646285325.000000
2017-01-01	66989724045.000000