Quarter	Billions of US Dollars
1998-01-01	0.01279
2004-10-01	0.00010
2005-01-01	2.45007
2005-04-01	1.21352
2005-07-01	0.76691
2005-10-01	1.66905
2006-01-01	1.81959
2006-04-01	0.76633
2006-07-01	1.45566
2006-10-01	1.19223
2007-01-01	3.86119
2007-04-01	1.76759
2007-07-01	1.22897
2007-10-01	1.61471
2008-01-01	2.53928
2008-04-01	2.23685
2008-07-01	1.65117
2008-10-01	0.63159
2009-01-01	1.67120
2009-04-01	0.97604
2009-07-01	1.79472
2009-10-01	1.13402
2010-01-01	2.43016
2010-04-01	1.72101
2010-07-01	1.29343
2010-10-01	3.30243
2011-01-01	1.91622
2011-04-01	2.59809
2011-07-01	2.11757
2011-10-01	1.53996
2012-01-01	3.54945
2012-04-01	3.40260
2012-07-01	3.44092
2012-10-01	2.20754
2013-01-01	3.79159
2013-04-01	2.16843
2013-07-01	1.31187
2013-10-01	1.17495
2014-01-01	2.33720
2014-04-01	4.17170
2014-07-01	2.39226
2014-10-01	1.55800
2015-01-01	1.27483
2015-04-01	2.64201