Quarter	US Dollars, Sum Over Component Sub-periods
1998-01-01	6500000000
1998-04-01	6000000000
1998-07-01	8800000000
1998-10-01	5400000000
1999-01-01	6600000000
1999-04-01	7500000000
1999-07-01	8300000000
1999-10-01	9200000000
2000-01-01	8400000000
2000-04-01	8900000000
2000-07-01	9300000000
2000-10-01	9500000000
2001-01-01	9100000000
2001-04-01	9700000000
2001-07-01	9600000000
2001-10-01	10900000000
2002-01-01	10400000000
2002-04-01	12100000000
2002-07-01	11800000000
2002-10-01	12200000000
2003-01-01	13400000000
2003-04-01	12100000000
2003-07-01	13800000000
2003-10-01	16100000000
2004-01-01	16100000000
2004-04-01	16900000000
2004-07-01	20200000000
2004-10-01	19600000000
2005-01-01	18700000000
2005-04-01	19900000000
2005-07-01	23500000000
2005-10-01	21800000000
2006-01-01	22100000000
2006-04-01	23800000000
2006-07-01	27800000000
2006-10-01	27000000000
2007-01-01	28300000000
2007-04-01	30800000000
2007-07-01	34700000000
2007-10-01	36400000000
2008-01-01	36900000000
2008-04-01	38500000000
2008-07-01	43200000000
2008-10-01	40300000000
2009-01-01	36300000000
2009-04-01	35300000000
2009-07-01	42900000000
2009-10-01	44300000000
2010-01-01	43100000000
2010-04-01	46700000000
2010-07-01	49800000000
2010-10-01	53700000000
2011-01-01	63600000000
2011-04-01	56100000000
2011-07-01	64600000000
2011-10-01	63300000000
2012-01-01	61700000000
2012-04-01	68800000000
2012-07-01	77600000000
2012-10-01	73100000000
2013-01-01	73700000000
2013-04-01	78100000000