Quarter	US Dollars, Sum Over Component Sub-periods
1997-01-01	200000000
1997-04-01	725000000
1997-07-01	581000000
1997-10-01	388000000
1998-01-01	767000000
1998-04-01	607000000
1998-07-01	1046000000
1998-10-01	791000000
1999-01-01	727000000
1999-04-01	640000000
1999-07-01	703000000
1999-10-01	593000000
2000-01-01	804000000
2000-04-01	875000000
2000-07-01	783000000
2000-10-01	1247000000
2001-01-01	816000000
2001-04-01	1462000000
2001-07-01	773000000
2001-10-01	964000000
2002-01-01	689000000
2002-04-01	1047000000
2002-07-01	1020000000
2002-10-01	1081000000
2003-01-01	1183000000
2003-04-01	1849000000
2003-07-01	1196000000
2003-10-01	1517000000
2004-01-01	3343000000
2004-04-01	3243000000
2004-07-01	3368000000
2004-10-01	3788000000
2005-01-01	3183000000
2005-04-01	3637000000
2005-07-01	3544000000
2005-10-01	3477000000
2006-01-01	3504000000
2006-04-01	4846000000
2006-07-01	4643000000
2006-10-01	5795000000
2007-01-01	5520000000
2007-04-01	7044000000
2007-07-01	6415000000
2007-10-01	7548000000
2008-01-01	5571000000
2008-04-01	7401000000
2008-07-01	6320000000
2008-10-01	4716000000
2009-01-01	4432000000
2009-04-01	6267000000
2009-07-01	5912000000
2009-10-01	6565000000
2010-01-01	5835000000
2010-04-01	6249000000
2010-07-01	7634000000
2010-10-01	7391000000
2011-01-01	6344000000
2011-04-01	9489000000
2011-07-01	8515000000
2011-10-01	7609000000
2012-01-01	7020000000
2012-04-01	7411000000
2012-07-01	8723000000
2012-10-01	7816000000
2013-01-01	6326000000
2013-04-01	7824000000
2013-07-01	8367000000
2013-10-01	7199000000
2014-01-01	6789000000