Quarter	US Dollars, Sum Over Component Sub-periods
1997-01-01	460000000
1997-04-01	790000000
1997-07-01	780000000
1997-10-01	1050000000
1998-01-01	1010000000
1998-04-01	1320000000
1998-07-01	1680000000
1998-10-01	1120000000
1999-01-01	1130000000
1999-04-01	1080000000
1999-07-01	2500000000
1999-10-01	1770000000
2000-01-01	1895000000
2000-04-01	1221000000
2000-07-01	1056000000
2000-10-01	5171000000
2001-01-01	1151000000
2001-04-01	889000000
2001-07-01	749000000
2001-10-01	2925000000
2002-01-01	1099000000
2002-04-01	819000000
2002-07-01	847000000
2002-10-01	1366000000
2003-01-01	1547000000
2003-04-01	935000000
2003-07-01	605000000
2003-10-01	1502000000
2004-01-01	4946000000
2004-04-01	3334000000
2004-07-01	1865000000
2004-10-01	2571000000
2005-01-01	2796000000
2005-04-01	1411000000
2005-07-01	2235000000
2005-10-01	3867000000
2006-01-01	4690000000
2006-04-01	2510000000
2006-07-01	1533000000
2006-10-01	11143000000
2007-01-01	5819000000
2007-04-01	4659000000
2007-07-01	6617000000
2007-10-01	6556000000
2008-01-01	5658000000
2008-04-01	4085000000
2008-07-01	2511000000
2008-10-01	2724000000
2009-01-01	3098000000
2009-04-01	2566000000
2009-07-01	4545000000
2009-10-01	2813000000
2010-01-01	5873000000
2010-04-01	-1246000000
2010-07-01	2358000000
2010-10-01	7360000000
2011-01-01	7710000000
2011-04-01	3462000000
2011-07-01	5183000000
2011-10-01	4298000000
2012-01-01	-1788000000
2012-04-01	2386000000
2012-07-01	1726000000
2012-10-01	3744000000
2013-01-01	230000000
2013-04-01	-3945000000
2013-07-01	2496000000
2013-10-01	-3948000000
2014-01-01	3795000000