Quarter	Billions of US Dollars
2002-07-01	0.61625
2002-10-01	1.04870
2003-01-01	1.08950
2003-04-01	1.14270
2003-07-01	1.16520
2003-10-01	1.26300
2004-01-01	1.22240
2004-04-01	1.21550
2004-07-01	1.24090
2004-10-01	1.36210
2005-01-01	1.29640
2005-04-01	1.20920
2005-07-01	1.20420
2005-10-01	1.17970
2006-01-01	1.21040
2006-04-01	1.27130
2006-07-01	1.26600
2006-10-01	1.31700
2007-01-01	1.33180
2007-04-01	1.35050
2007-07-01	0.53171
2007-10-01	0.55204
2008-01-01	0.59295