Quarter	US Dollars, Sum Over Component Sub-periods
1994-01-01	-4062000000
1994-04-01	2457000000
1994-07-01	-6520000000
1994-10-01	-4920000000
1995-01-01	-398000000
1995-04-01	3169000000
1995-07-01	4263000000
1995-10-01	6376000000
1996-01-01	231000000
1996-04-01	-3151000000
1996-07-01	-1696000000
1996-10-01	-7424000000
1997-01-01	-4234000000
1997-04-01	584000000
1997-07-01	-1018000000
1997-10-01	-31195000000
1998-01-01	-72000000
1998-04-01	1870000000
1998-07-01	231000000
1998-10-01	-7919000000
1999-01-01	-4310000000
1999-04-01	-1053000000
1999-07-01	-4050000000
1999-10-01	-4773000000
2000-01-01	-7261000000
2000-04-01	-2761000000
2000-07-01	-5495000000
2000-10-01	-6179000000
2001-01-01	-7103000000
2001-04-01	-1928000000
2001-07-01	8338000000
2001-10-01	-5686000000
2002-01-01	-5612000000
2002-04-01	779000000
2002-07-01	2740000000
2002-10-01	-86000000
2003-01-01	69000000
2003-04-01	4152000000
2003-07-01	-3597000000
2003-10-01	6135000000
2004-01-01	-5626000000
2004-04-01	-6699000000
2004-07-01	-6885000000
2004-10-01	10246000000
2005-01-01	-1687000000
2005-04-01	-6824000000
2005-07-01	-654000000
2005-10-01	18195000000
2006-01-01	-5112000000
2006-04-01	6033000000
2006-07-01	-31509000000
2006-10-01	11505000000
2007-01-01	4149000000
2007-04-01	52913000000
2007-07-01	-1365000000
2007-10-01	23991000000
2008-01-01	-20246000000
2008-04-01	28325000000
2008-07-01	-11457000000
2008-10-01	-110898000000
2009-01-01	-15548000000
2009-04-01	5602000000
2009-07-01	-19230000000
2009-10-01	10132000000
2010-01-01	-11051000000
2010-04-01	5418000000
2010-07-01	-4585000000
2010-10-01	-3163000000
2011-01-01	-21812000000
2011-04-01	3117000000
2011-07-01	-7631000000
2011-10-01	-16113000000
2012-01-01	-33427000000
2012-04-01	9283000000