Quarter	Billions of US Dollars
1993-07-01	0.15000
1993-10-01	0.09000
1994-01-01	0.22500
1994-04-01	0.22500
1994-07-01	0.22500
1994-10-01	0.22500
1995-01-01	0.17000
1995-04-01	0.17000
1995-07-01	0.40208
1995-10-01	0.30208
1996-01-01	0.52108
1996-04-01	0.57428
1996-07-01	0.41727
1996-10-01	0.37050
1997-01-01	0.12982
1997-04-01	0.07792
1997-07-01	0.00292
1998-04-01	0.05787
1998-07-01	0.05821
1998-10-01	0.05860
1999-01-01	0.05748
1999-07-01	0.13294
1999-10-01	0.13296
2000-01-01	0.37905
2000-04-01	1.25946
2000-07-01	1.11929
2000-10-01	1.41976
2001-01-01	1.28277
2001-04-01	0.63348
2001-07-01	1.23383
2001-10-01	0.94080
2002-01-01	0.82085
2002-04-01	1.14534
2002-07-01	0.52501
2002-10-01	0.52501
2003-01-01	0.52501
2003-04-01	0.05501
2003-07-01	0.66768
2003-10-01	0.89729
2004-01-01	0.88213
2004-04-01	1.14695
2004-07-01	1.10933
2004-10-01	1.11923
2005-01-01	1.14106
2005-04-01	0.87517
2005-07-01	0.25037
2005-10-01	0.22430
2006-01-01	0.39937
2006-04-01	0.35907
2006-07-01	0.35560
2006-10-01	0.36133
2007-01-01	0.46730
2007-04-01	0.47124
2007-07-01	0.47877
2007-10-01	1.13633
2008-01-01	0.81670
2008-04-01	1.11118
2008-07-01	1.10619
2008-10-01	0.29440
2009-01-01	0.31940
2009-04-01	0.13949
2009-07-01	0.79056
2009-10-01	0.84514
2010-01-01	0.81946
2010-04-01	1.42947
2010-07-01	0.82624
2010-10-01	3.16952
2011-01-01	3.21841
2011-04-01	3.93183
2011-07-01	4.03100
2011-10-01	2.36529
2012-01-01	2.47834
2012-04-01	2.34572
2012-07-01	2.77654
2012-10-01	4.24405
2013-01-01	4.13179
2013-04-01	3.06250
2013-07-01	2.51476
2013-10-01	1.19370
2014-01-01	1.31328
2014-04-01	1.96266
2014-07-01	1.96124
2014-10-01	2.24610
2015-01-01	2.32944
2015-04-01	2.49290