Quarter	US Dollars, Sum Over Component Sub-periods
1997-01-01	-1534000000
1997-04-01	-1194000000
1997-07-01	-910000000
1997-10-01	-671000000
1998-01-01	-1992000000
1998-04-01	-675000000
1998-07-01	-1205000000
1998-10-01	-2969000000
1999-01-01	-2238000000
1999-04-01	-2752000000
1999-07-01	-3003000000
1999-10-01	-3560000000
2000-01-01	-2958000000
2000-04-01	-2821000000
2000-07-01	-1899000000
2000-10-01	-2665000000
2001-01-01	-1539000000
2001-04-01	-2257000000
2001-07-01	-599000000
2001-10-01	-1551000000
2002-01-01	-1682000000
2002-04-01	-1747000000
2002-07-01	-790000000
2002-10-01	-1325000000
2003-01-01	-1954000000
2003-04-01	-1447000000
2003-07-01	-884000000
2003-10-01	-1188000000
2004-01-01	-3304000000
2004-04-01	-4095000000
2004-07-01	-3401000000
2004-10-01	-2458000000
2005-01-01	-1576000000
2005-04-01	-1313000000
2005-07-01	-2062000000
2005-10-01	-2291000000
2006-01-01	-2711000000
2006-04-01	-2810000000
2006-07-01	-2685000000
2006-10-01	-4941000000
2007-01-01	-5125000000
2007-04-01	-7065000000
2007-07-01	-5988000000
2007-10-01	-8323000000
2008-01-01	-8013000000
2008-04-01	-9865000000
2008-07-01	-8748000000
2008-10-01	-8331000000
2009-01-01	-2604000000
2009-04-01	-3681000000
2009-07-01	-4231000000
2009-10-01	-6639000000
2010-01-01	-3699000000
2010-04-01	-3639000000
2010-07-01	-7589000000
2010-10-01	-9103000000
2011-01-01	-5008000000
2011-04-01	-6233000000
2011-07-01	-7107000000
2011-10-01	-7422000000
2012-01-01	-6110000000
2012-04-01	-3280000000
2012-07-01	-4507000000
2012-10-01	-4366000000
2013-01-01	-3051000000
2013-04-01	634000000
2013-07-01	-2761000000
2013-10-01	-1927000000
2014-01-01	-1040000000