Quarter	US Dollars, Sum Over Component Sub-periods
1997-01-01	859000000
1997-04-01	-3100000000
1997-07-01	942000000
1997-10-01	-1745000000
1998-01-01	-3286000000
1998-04-01	-2520000000
1998-07-01	-15000000
1998-10-01	-107000000
1999-01-01	-850000000
1999-04-01	638000000
1999-07-01	226000000
1999-10-01	-175000000
2000-01-01	567000000
2000-04-01	199000000
2000-07-01	-11000000
2000-10-01	-1372000000
2001-01-01	-1244000000
2001-04-01	513000000
2001-07-01	-121000000
2001-10-01	1288000000
2002-01-01	-575000000
2002-04-01	636000000
2002-07-01	-1117000000
2002-10-01	421000000
2003-01-01	-839000000
2003-04-01	-151000000
2003-07-01	-394000000
2003-10-01	189000000
2004-01-01	-2329000000
2004-04-01	-269000000
2004-07-01	86000000
2004-10-01	1722000000
2005-01-01	-2496000000
2005-04-01	-3879000000
2005-07-01	-10000000
2005-10-01	-1750000000
2006-01-01	-1203000000
2006-04-01	-1272000000
2006-07-01	-1516000000
2006-10-01	1511000000
2007-01-01	-1872000000
2007-04-01	-3219000000
2007-07-01	-2011000000
2007-10-01	-5935000000
2008-01-01	-8432000000
2008-04-01	-5867000000
2008-07-01	5631000000
2008-10-01	10632000000
2009-01-01	-261000000
2009-04-01	-3481000000
2009-07-01	-9217000000
2009-10-01	-1783000000
2010-01-01	-8445000000
2010-04-01	-3500000000
2010-07-01	-7589000000
2010-10-01	4402000000
2011-01-01	-10213000000
2011-04-01	-807000000
2011-07-01	5253000000
2011-10-01	-516000000
2012-01-01	-959000000
2012-04-01	-4519000000
2012-07-01	-2341000000
2012-10-01	-3382000000
2013-01-01	-2572000000
2013-04-01	-1547000000
2013-07-01	2292000000
2013-10-01	882000000
2014-01-01	4467000000