Quarter	Billions of US Dollars
2001-01-01	0.00343
2001-04-01	0.00343
2001-07-01	0.00686
2001-10-01	0.00686
2002-01-01	0.00800
2002-04-01	0.00800
2002-07-01	0.00914
2002-10-01	0.00914
2003-01-01	0.00914
2003-04-01	0.00914
2003-07-01	0.00914
2003-10-01	0.00914
2004-01-01	0.00914
2004-04-01	0.00914
2004-07-01	0.00914
2004-10-01	0.00914
2005-01-01	0.01143
2005-04-01	0.01143
2005-07-01	0.01372
2005-10-01	0.01372
2006-01-01	0.01372
2006-04-01	0.01372
2006-07-01	0.01372
2006-10-01	0.01372
2007-01-01	0.01715
2007-04-01	0.01715
2007-07-01	0.02058
2007-10-01	0.02058
2008-01-01	0.02630
2008-04-01	0.02630
2008-07-01	0.03202
2008-10-01	0.03202
2009-01-01	0.03202
2009-04-01	0.03202
2009-07-01	0.03202
2009-10-01	0.03202
2010-01-01	0.03660
2010-04-01	0.03660
2010-07-01	0.04119
2010-10-01	0.04119
2011-01-01	0.04120
2011-04-01	0.04120
2011-07-01	0.04120
2011-10-01	0.04120
2012-01-01	0.25433
2012-04-01	0.24092
2012-07-01	0.22628
2012-10-01	0.23090
2014-10-01	0.18212
2015-01-01	0.16139
2015-04-01	0.16783