Quarter	Billions of US Dollars
1993-10-01	0.0105
1994-10-01	0.0105
1995-07-01	0.0250
1996-01-01	0.0170
1996-07-01	0.0500
1997-01-01	0.0200
1998-01-01	0.0350
1998-04-01	0.0350
1999-01-01	0.0150
1999-04-01	0.0460
1999-07-01	0.0400
2000-04-01	0.0330
2000-07-01	0.0512
2000-10-01	0.1039
2001-01-01	0.0616
2001-04-01	0.1192
2001-07-01	0.0255
2001-10-01	0.0050
2002-01-01	0.0720
2002-04-01	0.0872
2002-07-01	0.0050
2002-10-01	0.0128
2003-01-01	0.0333
2003-04-01	0.1595
2003-07-01	0.0321
2003-10-01	0.0100
2004-01-01	0.0257
2004-04-01	0.3029
2004-07-01	0.5954
2004-10-01	0.7134
2005-01-01	0.9979
2005-04-01	0.9180
2005-07-01	0.1665
2005-10-01	0.2722
2006-01-01	0.0516
2006-04-01	0.2228
2006-07-01	0.0579
2006-10-01	0.0500
2007-04-01	0.0128
2007-07-01	0.1537
2007-10-01	0.1500
2008-01-01	0.3837
2008-04-01	0.5904
2008-07-01	0.3443
2008-10-01	0.1329
2009-01-01	0.1077
2009-04-01	0.3287
2009-07-01	0.1398
2009-10-01	0.1330
2010-01-01	0.2556
2010-04-01	0.4090
2010-07-01	0.5097
2010-10-01	0.9923
2011-01-01	1.4851
2011-04-01	3.9381
2011-07-01	3.1758
2011-10-01	5.8830
2012-01-01	14.2006
2012-04-01	9.6537
2012-07-01	7.9147
2012-10-01	13.7338
2013-01-01	19.1925
2013-04-01	16.5256
2013-07-01	20.0725
2013-10-01	24.7004
2014-01-01	39.1940
2014-04-01	39.5968
2014-07-01	37.6651
2014-10-01	26.1493
2015-01-01	39.3931
2015-04-01	27.5836