Quarter	Billions of US Dollars
1993-10-01	0.01600
1994-04-01	0.02000
1994-07-01	0.02860
1994-10-01	0.04270
1995-01-01	0.03410
1995-04-01	0.02650
1995-07-01	0.01670
1995-10-01	0.08245
1996-01-01	0.09710
1996-04-01	0.19010
1996-07-01	0.28251
1996-10-01	0.24640
1997-01-01	0.29506
1997-04-01	0.24709
1997-07-01	0.23517
1997-10-01	0.15392
1998-01-01	0.10872
1998-04-01	0.00800
1998-07-01	0.05100
1998-10-01	0.00100
1999-01-01	0.00001
1999-04-01	0.00102
1999-07-01	0.00414
1999-10-01	0.00070
2000-01-01	0.00050
2000-04-01	0.00043
2002-10-01	0.02500
2003-01-01	0.10000
2003-10-01	0.05155
2004-01-01	0.17845
2004-04-01	0.32500
2004-07-01	0.15400
2004-10-01	0.02485
2005-01-01	0.07750
2005-04-01	0.44500
2005-07-01	0.09700
2005-10-01	0.28901
2006-01-01	0.74663
2006-04-01	0.22445
2006-07-01	0.43145
2006-10-01	0.10351
2007-01-01	0.23832
2007-04-01	0.61172
2007-07-01	0.11204
2007-10-01	1.48243
2008-01-01	0.42453
2008-04-01	0.84819
2008-07-01	0.31853
2008-10-01	0.02400
2009-01-01	0.05000
2009-04-01	0.34978
2009-07-01	0.64790
2009-10-01	0.35500
2010-01-01	0.03000
2010-04-01	0.09500
2010-07-01	0.02491
2010-10-01	0.10509
2011-01-01	0.00850
2011-04-01	0.45246
2011-07-01	0.00700
2011-10-01	0.47246
2012-01-01	1.50666
2012-04-01	0.56591
2012-07-01	1.17718
2012-10-01	0.82475
2013-01-01	0.62153
2013-04-01	1.28940
2013-07-01	1.56545
2013-10-01	0.92565
2014-01-01	1.23280
2014-04-01	2.24919
2014-07-01	2.37121
2014-10-01	3.67058
2015-01-01	2.04276
2015-04-01	1.75378