Quarter	US Dollars, Sum Over Component Sub-periods
1997-01-01	7000000
1997-04-01	10000000
1997-07-01	18000000
1997-10-01	55000000
1998-01-01	19000000
1998-04-01	-3000000
1998-07-01	7000000
1998-10-01	49000000
1999-01-01	19000000
1999-04-01	-6000000
1999-07-01	-10000000
1999-10-01	47000000
2000-01-01	-20000000
2000-04-01	8000000
2000-07-01	-5000000
2000-10-01	51000000
2001-01-01	-3000000
2001-04-01	-4000000
2001-07-01	4000000
2001-10-01	79000000
2002-01-01	-18000000
2002-04-01	14000000
2002-07-01	20000000
2002-10-01	-23000000
2003-01-01	-17000000
2003-04-01	-11000000
2003-07-01	-6000000
2003-10-01	-12000000
2004-01-01	115000000
2004-04-01	156000000
2004-07-01	664000000
2004-10-01	245000000
2005-01-01	543000000
2005-04-01	88000000
2005-07-01	126000000
2005-10-01	238000000
2006-01-01	431000000
2006-04-01	260000000
2006-07-01	635000000
2006-10-01	779000000
2007-01-01	589000000
2007-04-01	684000000
2007-07-01	1158000000
2007-10-01	2340000000
2008-01-01	2005000000
2008-04-01	2756000000
2008-07-01	655000000
2008-10-01	699000000
2009-01-01	2455000000
2009-04-01	1385000000
2009-07-01	645000000
2009-10-01	2555000000
2010-01-01	1750000000
2010-04-01	1335000000
2010-07-01	1670000000
2010-10-01	3865000000
2011-01-01	1140000000
2011-04-01	2034000000
2011-07-01	2032000000
2011-10-01	4811000000
2012-01-01	1752000000
2012-04-01	2910000000
2012-07-01	3135000000
2012-10-01	3160000000
2013-01-01	1076000000
2013-04-01	4262000000
2013-07-01	3019000000
2013-10-01	3614000000
2014-01-01	2021000000