Quarter	US Dollars, Sum Over Component Sub-periods
1997-01-01	-76000000
1997-04-01	3503000000
1997-07-01	-623000000
1997-10-01	1970000000
1998-01-01	3935000000
1998-04-01	2735000000
1998-07-01	1737000000
1998-10-01	2513000000
1999-01-01	1825000000
1999-04-01	1271000000
1999-07-01	2063000000
1999-10-01	3029000000
2000-01-01	2494000000
2000-04-01	1698000000
2000-07-01	1716000000
2000-10-01	4313000000
2001-01-01	2625000000
2001-04-01	1259000000
2001-07-01	657000000
2001-10-01	-1368000000
2002-01-01	2590000000
2002-04-01	785000000
2002-07-01	2603000000
2002-10-01	1202000000
2003-01-01	2563000000
2003-04-01	1472000000
2003-07-01	2175000000
2003-10-01	2476000000
2004-01-01	6588000000
2004-04-01	3124000000
2004-07-01	1974000000
2004-10-01	-3689000000
2005-01-01	4664000000
2005-04-01	4412000000
2005-07-01	1349000000
2005-10-01	4755000000
2006-01-01	4034000000
2006-04-01	3422000000
2006-07-01	1179000000
2006-10-01	4626000000
2007-01-01	6915000000
2007-04-01	11460000000
2007-07-01	6562000000
2007-10-01	13130000000
2008-01-01	15834000000
2008-04-01	15498000000
2008-07-01	4492000000
2008-10-01	3215000000
2009-01-01	3366000000
2009-04-01	5372000000
2009-07-01	16023000000
2009-10-01	10141000000
2010-01-01	13391000000
2010-04-01	5772000000
2010-07-01	16533000000
2010-10-01	5308000000
2011-01-01	18487000000
2011-04-01	7698000000
2011-07-01	1125000000
2011-10-01	4644000000
2012-01-01	7416000000
2012-04-01	4618000000
2012-07-01	5788000000
2012-10-01	4752000000
2013-01-01	6549000000
2013-04-01	-1713000000
2013-07-01	674000000
2013-10-01	-1247000000
2014-01-01	-2966000000