Quarter	Billions of US Dollars
1997-01-01	0.07500
1997-04-01	0.07500
1997-07-01	0.07500
1997-10-01	0.07500
1998-01-01	0.07500
1998-04-01	0.07500
1998-07-01	0.07500
1998-10-01	0.07500
1999-01-01	0.07500
1999-04-01	0.07500
1999-07-01	0.07500
1999-10-01	0.07500
2005-10-01	0.65217
2006-01-01	0.65317
2006-04-01	0.66222
2006-07-01	0.65953
2006-10-01	0.95015
2007-01-01	0.95554
2007-04-01	0.97924
2007-07-01	0.98147
2007-10-01	0.97692
2008-01-01	1.01316
2008-04-01	1.01517
2008-07-01	0.96470
2008-10-01	0.44736
2009-01-01	0.40640
2009-04-01	0.43184
2009-07-01	0.45119
2009-10-01	0.44441
2010-01-01	0.43025
2010-04-01	0.39134
2010-07-01	0.44072
2010-10-01	0.44222
2011-01-01	0.47268
2011-04-01	0.49090
2011-07-01	0.45785
2011-10-01	0.22640
2012-01-01	0.32445
2012-04-01	0.30741
2012-07-01	0.31296
2012-10-01	0.31982
2013-01-01	0.30975
2013-04-01	0.31314
2013-07-01	0.32396
2013-10-01	0.10431
2014-01-01	0.05655
2014-04-01	0.05630
2014-07-01	0.05419
2014-10-01	0.05332
2015-01-01	0.02133
2015-04-01	0.02219