Quarter	Billions of US Dollars
1998-10-01	0.02283
1999-01-01	0.02188
1999-04-01	0.05462
1999-07-01	0.05470
1999-10-01	0.07009
2000-01-01	0.06483
2000-04-01	0.06450
2000-07-01	0.05839
2000-10-01	0.06146
2001-01-01	0.05780
2001-04-01	0.13048
2001-07-01	0.39283
2001-10-01	0.42469
2002-01-01	0.78076
2002-04-01	0.88246
2002-07-01	1.01286
2002-10-01	1.15138
2003-01-01	1.52051
2003-04-01	1.49692
2003-07-01	1.74895
2003-10-01	2.05478
2004-01-01	3.12518
2004-04-01	3.32127
2004-07-01	4.01543
2004-10-01	5.31461
2005-01-01	5.13449
2005-04-01	4.84825
2005-07-01	4.68824
2005-10-01	4.42502
2006-01-01	3.90672
2006-04-01	3.94866
2006-07-01	3.89770
2006-10-01	4.29920
2007-01-01	3.84649
2007-04-01	4.10875
2007-07-01	3.94108
2007-10-01	4.10006
2008-01-01	4.21259
2008-04-01	4.92285
2008-07-01	4.20949
2008-10-01	3.81402
2009-01-01	2.52722
2009-04-01	2.88585
2009-07-01	2.92302
2009-10-01	2.67207
2010-01-01	2.51278
2010-04-01	1.93638
2010-07-01	2.00163
2010-10-01	1.90708
2011-01-01	1.90411
2011-04-01	1.84551
2011-07-01	1.53976
2011-10-01	1.33408
2012-01-01	1.22618
2012-04-01	1.18603
2012-07-01	1.19944
2012-10-01	1.13519
2013-01-01	0.95230
2013-04-01	0.95885
2013-07-01	0.94554
2013-10-01	1.00005
2014-01-01	1.00903
2014-04-01	1.02310
2014-07-01	0.95983
2014-10-01	0.90515
2015-01-01	0.61158
2015-04-01	0.59572