Quarter	Billions of US Dollars
1993-07-01	0.49548
1993-10-01	0.41530
1994-01-01	0.33422
1994-04-01	0.21461
1994-07-01	0.35587
1994-10-01	0.55681
1995-01-01	0.63861
1995-04-01	0.80108
1995-07-01	0.65552
1995-10-01	0.28888
1996-01-01	0.33433
1996-04-01	0.31633
1996-07-01	0.28881
1996-10-01	0.40523
1997-01-01	0.32768
1997-04-01	0.33269
1997-07-01	0.39202
1997-10-01	0.37793
1998-01-01	0.42592
1998-04-01	0.35965
1998-07-01	0.34259
1998-10-01	0.15271
1999-01-01	0.07548
1999-04-01	0.09810
1999-07-01	0.06020
1999-10-01	0.25640
2000-01-01	0.28763
2000-04-01	0.27055
2000-07-01	0.22467
2000-10-01	0.12527
2001-01-01	0.14725
2001-04-01	0.14203
2001-07-01	0.15822
2001-10-01	0.10135
2002-01-01	0.02971
2002-04-01	0.10168
2002-07-01	0.10113
2002-10-01	0.37363
2003-01-01	0.70703
2003-04-01	0.65253
2003-07-01	0.66818
2003-10-01	0.36847
2004-01-01	0.20266
2004-04-01	0.26530
2004-07-01	0.57177
2004-10-01	0.97314
2005-01-01	1.06599
2005-04-01	0.99809
2005-07-01	1.15028
2005-10-01	0.70869
2006-01-01	0.99207
2006-04-01	1.09712
2006-07-01	0.59333
2006-10-01	0.35135
2007-01-01	0.03330
2007-04-01	0.60501
2007-07-01	0.84225
2007-10-01	1.51637
2008-01-01	2.11654
2008-04-01	2.75466
2008-07-01	2.26719
2008-10-01	3.16598
2009-01-01	4.32329
2009-04-01	3.51325
2009-07-01	4.20620
2009-10-01	3.54086
2010-01-01	1.65235
2010-04-01	1.62949
2010-07-01	1.16719
2010-10-01	1.90441
2011-01-01	2.02242
2011-04-01	2.71716
2011-07-01	2.53856
2011-10-01	2.00046
2012-01-01	2.49211
2012-04-01	1.78508
2012-07-01	1.83373
2012-10-01	3.37341
2013-01-01	5.42003
2013-04-01	6.72892
2013-07-01	7.97626
2013-10-01	6.83484
2014-01-01	4.33599
2014-04-01	3.06780
2014-07-01	2.07620
2014-10-01	2.42820
2015-01-01	1.97161
2015-04-01	2.26650