Quarter	US Dollars, Sum Over Component Sub-periods
1997-01-01	256000000
1997-04-01	983000000
1997-07-01	215000000
1997-10-01	-171000000
1998-01-01	512000000
1998-04-01	177000000
1998-07-01	-408000000
1998-10-01	1543000000
1999-01-01	-116000000
1999-04-01	-52000000
1999-07-01	-170000000
1999-10-01	1752000000
2000-01-01	2596000000
2000-04-01	307000000
2000-07-01	563000000
2000-10-01	-43000000
2001-01-01	2120000000
2001-04-01	-867000000
2001-07-01	61000000
2001-10-01	-247000000
2002-01-01	1700000000
2002-04-01	743000000
2002-07-01	897000000
2002-10-01	-289000000
2003-01-01	3101000000
2003-04-01	-860000000
2003-07-01	-482000000
2003-10-01	1981000000
2004-01-01	4150000000
2004-04-01	2241000000
2004-07-01	1614000000
2004-10-01	2566000000
2005-01-01	6262000000
2005-04-01	7719000000
2005-07-01	1490000000
2005-10-01	-376000000
2006-01-01	3804000000
2006-04-01	-2342000000
2006-07-01	-283000000
2006-10-01	527000000
2007-01-01	-139000000
2007-04-01	-792000000
2007-07-01	-1441000000
2007-10-01	2485000000
2008-01-01	-2679000000
2008-04-01	2986000000
2008-07-01	-392000000
2008-10-01	-4638000000
2009-01-01	-1289000000
2009-04-01	4595000000
2009-07-01	8119000000
2009-10-01	4777000000
2010-01-01	10068000000
2010-04-01	4010000000
2010-07-01	9299000000
2010-10-01	3272000000
2011-01-01	3597000000
2011-04-01	6128000000
2011-07-01	5192000000
2011-10-01	958000000
2012-01-01	6018000000
2012-04-01	4497000000
2012-07-01	5447000000
2012-10-01	4785000000
2013-01-01	4063000000
2013-04-01	-1870000000
2013-07-01	-732000000
2013-10-01	1191000000
2014-01-01	-199000000