Quarter	US Dollars, Sum Over Component Sub-periods
1997-01-01	923000000
1997-04-01	897000000
1997-07-01	838000000
1997-10-01	1066000000
1998-01-01	781000000
1998-04-01	874000000
1998-07-01	1031000000
1998-10-01	997000000
1999-01-01	774000000
1999-04-01	731000000
1999-07-01	863000000
1999-10-01	930000000
2000-01-01	2092000000
2000-04-01	2717000000
2000-07-01	2779000000
2000-10-01	2811000000
2001-01-01	1981000000
2001-04-01	2289000000
2001-07-01	2709000000
2001-10-01	2774000000
2002-01-01	1847000000
2002-04-01	2371000000
2002-07-01	2723000000
2002-10-01	3096000000
2003-01-01	2107000000
2003-04-01	2698000000
2003-07-01	3058000000
2003-10-01	3311000000
2004-01-01	2654000000
2004-04-01	3042000000
2004-07-01	3606000000
2004-10-01	4169000000
2005-01-01	3431000000
2005-04-01	4146000000
2005-07-01	4285000000
2005-10-01	4396000000
2006-01-01	4172000000
2006-04-01	5063000000
2006-07-01	5478000000
2006-10-01	5879000000
2007-01-01	5816000000
2007-04-01	6583000000
2007-07-01	7759000000
2007-10-01	8756000000
2008-01-01	7694000000
2008-04-01	9602000000
2008-07-01	10093000000
2008-10-01	8160000000
2009-01-01	5936000000
2009-04-01	6852000000
2009-07-01	7942000000
2009-10-01	8256000000
2010-01-01	6679000000
2010-04-01	8098000000
2010-07-01	8471000000
2010-10-01	9470000000
2011-01-01	7962000000
2011-04-01	10074000000
2011-07-01	10120000000
2011-10-01	9406000000
2012-01-01	8440000000
2012-04-01	9516000000
2012-07-01	9923000000
2012-10-01	10018000000
2013-01-01	8692000000
2013-04-01	10287000000
2013-07-01	10459000000
2013-10-01	10722000000
2014-01-01	9288000000