Quarter	US Dollars, Sum Over Component Sub-periods
1997-01-01	-1338000000
1997-04-01	1709000000
1997-07-01	-1429000000
1997-10-01	1568000000
1998-01-01	929000000
1998-04-01	1083000000
1998-07-01	-532000000
1998-10-01	971000000
1999-01-01	416000000
1999-04-01	194000000
1999-07-01	1638000000
1999-10-01	848000000
2000-01-01	-1168000000
2000-04-01	605000000
2000-07-01	-82000000
2000-10-01	1801000000
2001-01-01	730000000
2001-04-01	843000000
2001-07-01	521000000
2001-10-01	-1432000000
2002-01-01	751000000
2002-04-01	34000000
2002-07-01	-718000000
2002-10-01	329000000
2003-01-01	58000000
2003-04-01	786000000
2003-07-01	277000000
2003-10-01	2200000000
2004-01-01	84000000
2004-04-01	2015000000
2004-07-01	-483000000
2004-10-01	-2821000000
2005-01-01	-3138000000
2005-04-01	-1870000000
2005-07-01	677000000
2005-10-01	2599000000
2006-01-01	-1586000000
2006-04-01	4861000000
2006-07-01	2760000000
2006-10-01	4069000000
2007-01-01	3865000000
2007-04-01	8467000000
2007-07-01	7576000000
2007-10-01	10216000000
2008-01-01	15997000000
2008-04-01	10333000000
2008-07-01	1516000000
2008-10-01	-1031000000
2009-01-01	-334000000
2009-04-01	1876000000
2009-07-01	5064000000
2009-10-01	1499000000
2010-01-01	1914000000
2010-04-01	2960000000
2010-07-01	4736000000
2010-10-01	3683000000
2011-01-01	13082000000
2011-04-01	-68000000
2011-07-01	-6772000000
2011-10-01	335000000
2012-01-01	-977000000
2012-04-01	-1255000000
2012-07-01	118000000
2012-10-01	-1845000000
2013-01-01	1196000000
2013-04-01	1874000000
2013-07-01	3262000000
2013-10-01	-2738000000
2014-01-01	-3697000000