Quarter	US Dollars, Sum Over Component Sub-periods
1998-01-01	10500000000
1998-04-01	4400000000
1998-07-01	5300000000
1998-10-01	11400000000
1999-01-01	1200000000
1999-04-01	500000000
1999-07-01	10100000000
1999-10-01	9400000000
2000-01-01	3700000000
2000-04-01	2700000000
2000-07-01	6600000000
2000-10-01	7600000000
2001-01-01	6000000000
2001-04-01	-900000000
2001-07-01	5000000000
2001-10-01	7300000000
2002-01-01	8600000000
2002-04-01	4900000000
2002-07-01	6700000000
2002-10-01	15200000000
2003-01-01	2600000000
2003-04-01	8200000000
2003-07-01	8600000000
2003-10-01	23700000000
2004-01-01	3300000000
2004-04-01	5800000000
2004-07-01	17300000000
2004-10-01	42500000000
2005-01-01	23800000000
2005-04-01	29400000000
2005-07-01	33500000000
2005-10-01	45600000000
2006-01-01	34000000000
2006-04-01	47400000000
2006-07-01	60500000000
2006-10-01	89900000000
2007-01-01	66600000000
2007-04-01	86600000000
2007-07-01	98500000000
2007-10-01	101500000000
2008-01-01	82200000000
2008-04-01	95500000000
2008-07-01	109800000000
2008-10-01	133100000000
2009-01-01	67300000000
2009-04-01	39700000000
2009-07-01	45400000000
2009-10-01	90900000000
2010-01-01	25000000000
2010-04-01	43800000000
2010-07-01	82600000000
2010-10-01	86400000000
2011-01-01	1500000000
2011-04-01	43700000000
2011-07-01	42400000000
2011-10-01	48400000000
2012-01-01	23500000000
2012-04-01	53700000000
2012-07-01	70800000000
2012-10-01	45100000000
2013-01-01	47600000000
2013-04-01	50900000000