Quarter	Billions of US Dollars
2002-04-01	0.50000
2002-07-01	0.50000
2002-10-01	0.50000
2003-01-01	0.50000
2003-04-01	0.50000
2003-07-01	0.50000
2003-10-01	0.50000
2004-01-01	0.50000
2004-04-01	0.50000
2004-07-01	0.50000
2004-10-01	0.50000
2005-01-01	0.50000
2005-04-01	0.50000
2005-07-01	0.75000
2005-10-01	0.75000
2006-01-01	1.10000
2006-04-01	1.10000
2006-07-01	1.10000
2006-10-01	2.87898
2007-01-01	3.28208
2007-04-01	3.60371
2007-07-01	3.76319
2007-10-01	3.80934
2008-01-01	3.90345
2008-04-01	4.15228
2008-07-01	4.01028
2008-10-01	3.93766
2009-01-01	3.85365
2009-04-01	3.59018
2009-07-01	3.64128
2009-10-01	3.62061
2010-01-01	3.50189
2010-04-01	3.38813
2010-07-01	3.50719
2010-10-01	3.48315
2011-01-01	3.21981
2011-04-01	3.64324
2011-07-01	4.28413
2011-10-01	3.10611
2012-01-01	2.74209
2012-04-01	2.95802
2012-07-01	2.97440
2012-10-01	2.98296
2013-01-01	3.45340
2013-04-01	4.42787
2013-07-01	4.89493
2013-10-01	5.46369
2014-01-01	5.41108
2014-04-01	5.82871
2014-07-01	5.67325
2014-10-01	5.37924
2015-01-01	5.33051
2015-04-01	5.38086