Quarter	Billions of US Dollars
1998-04-01	0.15680
1998-07-01	0.14954
1998-10-01	0.12040
1999-01-01	0.12419
2006-04-01	0.01182
2006-07-01	0.02510
2006-10-01	0.05485
2007-01-01	0.09176
2007-04-01	0.11126
2007-07-01	0.14651
2007-10-01	0.16127
2008-01-01	0.24233
2008-04-01	0.24211
2008-07-01	0.18806
2008-10-01	0.13977
2009-01-01	0.06697
2009-04-01	0.05003
2009-07-01	0.03130
2009-10-01	0.05582
2010-01-01	0.05401
2010-04-01	0.03993
2010-07-01	0.04179
2010-10-01	0.10744
2011-01-01	0.14668
2011-04-01	0.17999
2011-07-01	0.16709
2011-10-01	0.12785
2012-01-01	0.07587
2012-04-01	0.10525
2012-07-01	0.10393
2012-10-01	0.10213
2013-01-01	0.10594
2013-04-01	0.11874
2013-07-01	0.12146
2013-10-01	0.12445
2014-01-01	0.00685
2014-04-01	0.00145
2014-07-01	0.00352