Quarter	Billions of US Dollars
1998-04-01	0.02725
1998-07-01	0.05446
1998-10-01	0.05562
1999-01-01	0.07354
1999-04-01	0.02545
1999-07-01	0.04861
1999-10-01	0.42186
2000-01-01	0.72294
2000-04-01	0.84155
2000-07-01	0.81425
2000-10-01	1.11629
2001-01-01	1.10976
2001-04-01	0.85651
2001-07-01	0.78245
2001-10-01	0.38883
2002-01-01	0.12100
2002-04-01	0.10417
2002-07-01	0.10149
2002-10-01	0.00547
2003-01-01	0.06861
2003-04-01	0.10188
2003-07-01	0.26306
2003-10-01	0.29806
2004-01-01	0.29629
2004-04-01	0.37096
2004-07-01	0.40857
2004-10-01	0.57455
2005-01-01	0.70700
2005-04-01	0.73205
2005-07-01	0.72233
2005-10-01	0.62245
2006-01-01	0.79554
2006-04-01	0.78247
2006-07-01	0.82514
2006-10-01	1.35570
2007-01-01	1.50402
2007-04-01	1.69155
2007-07-01	1.91528
2007-10-01	2.38387
2008-01-01	2.11320
2008-04-01	3.00786
2008-07-01	2.25283
2008-10-01	2.11228
2009-01-01	1.53533
2009-04-01	1.57639
2009-07-01	1.89282
2009-10-01	1.90730
2010-01-01	2.26244
2010-04-01	2.03906
2010-07-01	2.62787
2010-10-01	2.66301
2011-01-01	2.70707
2011-04-01	3.21670
2011-07-01	2.27605
2011-10-01	0.28841
2012-01-01	0.22220
2012-04-01	0.18313
2012-07-01	0.19829
2012-10-01	0.23244
2013-01-01	0.29120
2013-04-01	0.20953
2013-07-01	0.22644
2013-10-01	0.16139
2014-01-01	0.13620
2014-04-01	0.11940
2014-07-01	0.09126
2014-10-01	0.08089
2015-01-01	0.07292
2015-04-01	0.07619