Quarter	US Dollars, Sum Over Component Sub-periods
1994-01-01	-5212000000
1994-04-01	-749000000
1994-07-01	-6685000000
1994-10-01	-7365000000
1995-01-01	-1704000000
1995-04-01	810000000
1995-07-01	759000000
1995-10-01	-475000000
1996-01-01	-4346000000
1996-04-01	-8872000000
1996-07-01	-5259000000
1996-10-01	-9642000000
1997-01-01	3070000000
1997-04-01	-6404000000
1997-07-01	-8357000000
1997-10-01	-8971000000
1998-01-01	-2785000000
1998-04-01	-2195000000
1998-07-01	-3574000000
1998-10-01	-6365000000
1999-01-01	-5149000000
1999-04-01	-437000000
1999-07-01	-3639000000
1999-10-01	-4072000000
2000-01-01	-6634000000
2000-04-01	-2415000000
2000-07-01	-2555000000
2000-10-01	-5921000000
2001-01-01	-6138000000
2001-04-01	-2723000000
2001-07-01	10071000000
2001-10-01	-1062000000
2002-01-01	-5408000000
2002-04-01	4755000000
2002-07-01	4139000000
2002-10-01	-1790000000
2003-01-01	-2772000000
2003-04-01	-246000000
2003-07-01	-10153000000
2003-10-01	-2715000000
2004-01-01	-6697000000
2004-04-01	-10665000000
2004-07-01	-7771000000
2004-10-01	-1512000000
2005-01-01	-10315000000
2005-04-01	-14465000000
2005-07-01	1930000000
2005-10-01	-10479000000
2006-01-01	-18215000000
2006-04-01	-1278000000
2006-07-01	-11654000000
2006-10-01	-18276000000
2007-01-01	-20663000000
2007-04-01	3248000000
2007-07-01	-32299000000
2007-10-01	-10348000000
2008-01-01	-34068000000
2008-04-01	-19492000000
2008-07-01	-41383000000
2008-10-01	-82572000000
2009-01-01	1298000000
2009-04-01	6445000000
2009-07-01	-15978000000
2009-10-01	14376000000
2010-01-01	-6978000000
2010-04-01	6846000000
2010-07-01	-14710000000
2010-10-01	-8551000000
2011-01-01	-21478000000
2011-04-01	-15945000000
2011-07-01	-13445000000
2011-10-01	-32459000000
2012-01-01	-33028000000
2012-04-01	-9715000000