Quarter	US Dollars, Sum Over Component Sub-periods
1997-01-01	783000000
1997-04-01	403000000
1997-07-01	319000000
1997-10-01	225000000
1998-01-01	649000000
1998-04-01	215000000
1998-07-01	1722000000
1998-10-01	2406000000
1999-01-01	975000000
1999-04-01	1909000000
1999-07-01	2289000000
1999-10-01	2854000000
2000-01-01	3061000000
2000-04-01	1897000000
2000-07-01	1705000000
2000-10-01	2941000000
2001-01-01	1381000000
2001-04-01	1772000000
2001-07-01	536000000
2001-10-01	-80000000
2002-01-01	2015000000
2002-04-01	1421000000
2002-07-01	1486000000
2002-10-01	1623000000
2003-01-01	1724000000
2003-04-01	1321000000
2003-07-01	1781000000
2003-10-01	2665000000
2004-01-01	4259000000
2004-04-01	2855000000
2004-07-01	2060000000
2004-10-01	-1967000000
2005-01-01	2168000000
2005-04-01	533000000
2005-07-01	1339000000
2005-10-01	3005000000
2006-01-01	2831000000
2006-04-01	2150000000
2006-07-01	-337000000
2006-10-01	6137000000
2007-01-01	5043000000
2007-04-01	8241000000
2007-07-01	4551000000
2007-10-01	7195000000
2008-01-01	7402000000
2008-04-01	9631000000
2008-07-01	10123000000
2008-10-01	13847000000
2009-01-01	3105000000
2009-04-01	1891000000
2009-07-01	6806000000
2009-10-01	8358000000
2010-01-01	4946000000
2010-04-01	2272000000
2010-07-01	8944000000
2010-10-01	9710000000
2011-01-01	8274000000
2011-04-01	6891000000
2011-07-01	6378000000
2011-10-01	4128000000
2012-01-01	6457000000
2012-04-01	99000000
2012-07-01	3447000000
2012-10-01	1370000000
2013-01-01	3977000000
2013-04-01	-3260000000
2013-07-01	2966000000
2013-10-01	-365000000
2014-01-01	1501000000