Quarter	Billions of US Dollars
1987-07-01	0.0150
1989-01-01	0.0050
1989-04-01	0.0050
2001-04-01	0.3816
2001-07-01	0.4109
2001-10-01	0.3966
2002-01-01	0.3926
2002-04-01	0.4489
2002-07-01	0.4437
2002-10-01	0.4719
2003-01-01	0.4903
2003-04-01	0.5142
2003-07-01	0.5243
2003-10-01	0.5683
2004-01-01	0.5501
2004-04-01	0.5470
2004-07-01	0.6825
2004-10-01	0.8173
2005-01-01	0.9399
2005-04-01	0.9674
2005-07-01	1.5655
2005-10-01	1.8875
2006-01-01	2.6629
2006-04-01	2.2883
2006-07-01	3.8613
2006-10-01	5.4656
2007-01-01	6.9654
2007-04-01	7.8870
2007-07-01	8.2807
2007-10-01	8.5972
2008-01-01	10.8155
2008-04-01	11.5709
2008-07-01	11.0478
2008-10-01	10.5186
2009-01-01	9.0602
2009-04-01	9.6932
2009-07-01	9.8959
2009-10-01	11.1043
2010-01-01	9.5405
2010-04-01	8.0479
2010-07-01	8.8417
2010-10-01	8.1945
2011-01-01	8.0155
2011-04-01	8.0902
2011-07-01	7.6404
2011-10-01	7.4208
2012-01-01	7.5553
2012-04-01	6.6017
2012-07-01	7.1575
2012-10-01	8.4381
2013-01-01	8.2193
2013-04-01	8.3686
2013-07-01	8.6064
2013-10-01	8.7479
2014-01-01	8.6702
2014-04-01	8.0539
2014-07-01	6.6772
2014-10-01	7.6150
2015-01-01	7.0444
2015-04-01	7.1557