Quarter	Billions of US Dollars
1998-04-01	0.02495
1998-07-01	0.00014
2001-07-01	0.00322
2001-10-01	0.00033
2005-01-01	0.24759
2005-04-01	0.07350
2005-07-01	0.05525
2005-10-01	0.22284
2006-01-01	0.27464
2006-04-01	0.01488
2006-07-01	0.03337
2006-10-01	0.37897
2007-01-01	0.24960
2007-04-01	0.23092
2007-07-01	0.79533
2007-10-01	1.31088
2008-01-01	0.80956
2008-04-01	1.18449
2008-07-01	0.60778
2008-10-01	0.58102
2009-01-01	0.13420
2009-04-01	0.02573
2009-07-01	0.10279
2009-10-01	0.17107
2010-01-01	0.09974
2010-04-01	0.00735
2010-07-01	0.23557
2010-10-01	0.08743
2011-04-01	0.11940
2011-07-01	0.21290
2011-10-01	0.03216
2012-01-01	0.15100
2012-04-01	0.01732
2012-07-01	0.21496
2012-10-01	0.13814
2013-01-01	0.23446
2013-04-01	0.06243
2013-07-01	0.18290
2013-10-01	0.09486
2014-01-01	0.28649
2014-04-01	0.14689
2014-07-01	0.09667
2014-10-01	0.13251
2015-01-01	0.29259
2015-04-01	0.02818