Year	US Dollars, Sum Over Component Sub-periods
1980-01-01	-10434100000.0000000
1981-01-01	-16240600000.0000000
1982-01-01	-5890100000.0000000
1983-01-01	5859600000.0000000
1984-01-01	4183399999.9999995
1985-01-01	799500000.0000000
1986-01-01	-1373500000.0000000
1987-01-01	4239000000.0000000
1988-01-01	-2375600000.0000000
1989-01-01	-5821200000.0000000
1990-01-01	-7451000000.0000000
1991-01-01	-14646700000.0000000
1992-01-01	-24438500000.0000000
1993-01-01	-23399200000.0000000
1994-01-01	-29662000000.0000000
1995-01-01	-1576700000.0000000
1996-01-01	-2507600000.0000000
1997-01-01	-7665300000.0000000
1998-01-01	-15992700000.0000000
1999-01-01	-13999700000.0000000
2000-01-01	-18752400000.0000000
2001-01-01	-17752500000.0000000
2002-01-01	-14876400000.0000000
2003-01-01	-8345000000.0000000
2004-01-01	-7016600000.0000000
2005-01-01	-9053200000.0000000
2006-01-01	-7514600000.0000000
2007-01-01	-14509600000.0000000
2008-01-01	-20378600000.0000000
2009-01-01	-8714800000.0000000
2010-01-01	-5266400000.0000000
2011-01-01	-14010200000.0000000
2012-01-01	-17022900000.0000020
2013-01-01	-30973400000.0000000
2014-01-01	-26202900000.0000000
2015-01-01	-33346800000.0000040
2016-01-01	-27858200000.0000000