Quarter	US Dollars, Sum Over Component Sub-periods
1997-01-01	-10000000
1997-04-01	-10000000
1997-07-01	0
1997-10-01	-20000000
1998-01-01	0
1998-04-01	-60000000
1998-07-01	0
1998-10-01	-100000000
1999-01-01	0
1999-04-01	-40000000
1999-07-01	-30000000
1999-10-01	-50000000
2000-01-01	-11000000
2000-04-01	-2000000
2000-07-01	10000000
2000-10-01	-13000000
2001-01-01	48000000
2001-04-01	16000000
2001-07-01	24000000
2001-10-01	2000000
2002-01-01	32000000
2002-04-01	5000000
2002-07-01	-153000000
2002-10-01	-114000000
2003-01-01	-80000000
2003-04-01	-71000000
2003-07-01	-60000000
2003-10-01	-94000000
2004-01-01	-5000000
2004-04-01	-191000000
2004-07-01	-134000000
2004-10-01	-625000000
2005-01-01	-192000000
2005-04-01	-742000000
2005-07-01	-476000000
2005-10-01	-1982000000
2006-01-01	-199000000
2006-04-01	-404000000
2006-07-01	-937000000
2006-10-01	-7628000000
2007-01-01	-70000000
2007-04-01	-762000000
2007-07-01	-1699000000
2007-10-01	-3133000000
2008-01-01	-1451000000
2008-04-01	-1438000000
2008-07-01	-1366000000
2008-10-01	-358000000
2009-01-01	-1269000000
2009-04-01	-2131000000
2009-07-01	-438000000
2009-10-01	-724000000
2010-01-01	-1088000000
2010-04-01	1120000000
2010-07-01	-1273000000
2010-10-01	-6243000000
2011-01-01	-3242000000
2011-04-01	-2318000000
2011-07-01	-1090000000
2011-10-01	-1593000000
2012-01-01	1096000000
2012-04-01	399000000
2012-07-01	-688000000
2012-10-01	-1562000000
2013-01-01	1263000000
2013-04-01	3379000000
2013-07-01	-1920000000
2013-10-01	2145000000
2014-01-01	770000000