Quarter	Billions of US Dollars
1997-10-01	0.1798
2000-07-01	0.0100
2001-04-01	0.0500
2001-07-01	0.4950
2001-10-01	0.0358
2002-01-01	0.1376
2002-04-01	0.1051
2002-07-01	0.0989
2002-10-01	0.1096
2003-01-01	0.2951
2003-04-01	0.9157
2003-07-01	1.1552
2003-10-01	1.2968
2004-01-01	2.8988
2004-04-01	2.2269
2004-07-01	3.0925
2004-10-01	3.0032
2005-01-01	3.7425
2005-04-01	5.5101
2005-07-01	3.7296
2005-10-01	3.0897
2006-01-01	2.9510
2006-04-01	7.5873
2006-07-01	4.5275
2006-10-01	5.1030
2007-01-01	5.1744
2007-04-01	13.8339
2007-07-01	9.4249
2007-10-01	8.5897
2008-01-01	8.9817
2008-04-01	20.8683
2008-07-01	15.2631
2008-10-01	8.1187
2009-01-01	7.3145
2009-04-01	11.8624
2009-07-01	13.4782
2009-10-01	0.8333
2010-01-01	3.7259
2010-04-01	1.4573
2010-07-01	0.0886
2010-10-01	3.4840
2011-01-01	1.3097
2011-04-01	0.2125
2011-07-01	0.0113
2011-10-01	14.0083
2012-01-01	18.7015
2012-04-01	9.8890
2012-07-01	4.8299
2012-10-01	3.4478
2013-01-01	0.1722
2013-04-01	12.3674
2013-07-01	0.2941
2013-10-01	10.7405
2014-01-01	2.5788
2014-04-01	6.9417
2014-07-01	4.8359
2014-10-01	14.8180
2015-01-01	23.9158
2015-04-01	38.9786