Quarter	US Dollars, Sum Over Component Sub-periods
1994-01-01	-2540000000
1994-04-01	-1097000000
1994-07-01	-2602000000
1994-10-01	-4479000000
1995-01-01	-2243000000
1995-04-01	-2687000000
1995-07-01	3110000000
1995-10-01	3861000000
1996-01-01	-471000000
1996-04-01	1890000000
1996-07-01	177000000
1996-10-01	-4728000000
1997-01-01	174000000
1997-04-01	1121000000
1997-07-01	3500000000
1997-10-01	4861000000
1998-01-01	5351000000
1998-04-01	6578000000
1998-07-01	4010000000
1998-10-01	-6414000000
1999-01-01	-3015000000
1999-04-01	-3114000000
1999-07-01	-2842000000
1999-10-01	-6836000000
2000-01-01	-9898000000
2000-04-01	-10499000000
2000-07-01	-18626000000
2000-10-01	-9481000000
2001-01-01	-8966000000
2001-04-01	-7265000000
2001-07-01	5604000000
2001-10-01	-4401000000
2002-01-01	-5343000000
2002-04-01	-5568000000
2002-07-01	663000000
2002-10-01	-403000000
2003-01-01	-9773000000
2003-04-01	-5745000000
2003-07-01	-3804000000
2003-10-01	-5921000000
2004-01-01	-9347000000
2004-04-01	-13069000000
2004-07-01	-14793000000
2004-10-01	-14805000000
2005-01-01	-18003000000
2005-04-01	-19314000000
2005-07-01	-8788000000
2005-10-01	-17820000000
2006-01-01	-28471000000
2006-04-01	-25359000000
2006-07-01	-28660000000
2006-10-01	-21905000000
2007-01-01	-17745000000
2007-04-01	-17086000000
2007-07-01	-12430000000
2007-10-01	-6937000000
2008-01-01	-32553000000
2008-04-01	-29964000000
2008-07-01	-24919000000
2008-10-01	-5313000000
2009-01-01	-1995000000
2009-04-01	-11026000000
2009-07-01	-5426000000
2009-10-01	-16563000000
2010-01-01	-28382000000
2010-04-01	-17047000000
2010-07-01	-9446000000
2010-10-01	-7992000000
2011-01-01	-26116000000
2011-04-01	-21755000000
2011-07-01	-18424000000
2011-10-01	-22429000000
2012-01-01	-29653000000
2012-04-01	-16968000000