Quarter	US Dollars, Sum Over Component Sub-periods
1998-01-01	-1800000000
1998-04-01	-9400000000
1998-07-01	-6600000000
1998-10-01	1200000000
1999-01-01	-3900000000
1999-04-01	-4200000000
1999-07-01	-4100000000
1999-10-01	-2400000000
2000-01-01	-3100000000
2000-04-01	-6200000000
2000-07-01	-4400000000
2000-10-01	-1000000000
2001-01-01	-1200000000
2001-04-01	-7400000000
2001-07-01	-4700000000
2001-10-01	-5900000000
2002-01-01	-1700000000
2002-04-01	-6800000000
2002-07-01	-4800000000
2002-10-01	-1700000000
2003-01-01	-1100000000
2003-04-01	-2600000000
2003-07-01	-3600000000
2003-10-01	-2900000000
2004-01-01	2200000000
2004-04-01	-4600000000
2004-07-01	-2100000000
2004-10-01	-600000000
2005-01-01	-2200000000
2005-04-01	-6300000000
2005-07-01	-5900000000
2005-10-01	-1700000000
2006-01-01	0
2006-04-01	-6000000000
2006-07-01	-1100000000
2006-10-01	1900000000
2007-01-01	3300000000
2007-04-01	100000000
2007-07-01	5300000000
2007-10-01	-700000000
2008-01-01	16300000000
2008-04-01	10600000000
2008-07-01	3100000000
2008-10-01	-1300000000
2009-01-01	-2900000000
2009-04-01	-6600000000
2009-07-01	-8700000000
2009-10-01	9600000000
2010-01-01	-5200000000
2010-04-01	-17900000000
2010-07-01	-1900000000
2010-10-01	-800000000
2011-01-01	-16800000000
2011-04-01	-16200000000
2011-07-01	-28500000000
2011-10-01	-8700000000
2012-01-01	17300000000
2012-04-01	-15600000000
2012-07-01	-3300000000
2012-10-01	-40500000000
2013-01-01	9000000000
2013-04-01	-9200000000