Quarter	Billions of US Dollars
1993-07-01	0.44650
1993-10-01	0.47881
1994-01-01	0.54029
1994-04-01	1.02993
1994-07-01	0.78268
1994-10-01	1.61123
1995-01-01	0.60226
1995-04-01	1.56369
1995-07-01	1.72758
1995-10-01	2.27652
1996-01-01	3.81700
1996-04-01	5.33114
1996-07-01	3.27749
1996-10-01	3.02893
1997-01-01	3.16447
1997-04-01	2.78843
1997-07-01	4.23968
1997-10-01	2.19418
1998-01-01	4.87853
1998-04-01	3.13258
1998-07-01	1.69712
1998-10-01	1.23567
1999-01-01	0.89856
1999-04-01	2.19090
1999-07-01	1.12811
1999-10-01	1.35193
2000-01-01	1.59364
2000-04-01	0.94186
2000-07-01	1.14069
2000-10-01	0.82036
2001-01-01	0.68726
2001-04-01	0.65783
2001-07-01	0.48711
2001-10-01	0.66289
2002-01-01	0.39125
2002-04-01	0.30642
2002-07-01	0.26009
2002-10-01	1.38309
2003-01-01	2.77553
2003-04-01	1.38892
2003-07-01	1.45529
2003-10-01	0.92689
2004-01-01	0.62673
2004-04-01	0.64815
2004-07-01	0.30638
2004-10-01	0.89034
2005-01-01	0.50213
2005-04-01	0.49131
2005-07-01	0.51218
2005-10-01	0.40937
2006-01-01	0.59552
2006-04-01	0.93840
2006-07-01	0.63642
2006-10-01	0.49357
2007-01-01	3.05422
2007-04-01	1.54992
2007-07-01	0.64041
2007-10-01	2.24558
2008-01-01	1.76090
2008-04-01	2.58204
2008-07-01	2.29924
2008-10-01	1.90796
2009-01-01	2.07300
2009-04-01	1.13151
2009-07-01	1.26832
2009-10-01	1.24440
2010-01-01	1.37667
2010-04-01	1.60808
2010-07-01	1.22666
2010-10-01	1.54683
2011-01-01	1.32325
2011-04-01	1.88086
2011-07-01	1.42449
2011-10-01	2.47648
2012-01-01	4.77838
2012-04-01	6.34117
2012-07-01	5.02028
2012-10-01	7.00126
2013-01-01	7.47950
2013-04-01	7.35987
2013-07-01	7.02424
2013-10-01	6.50203
2014-01-01	6.99955
2014-04-01	7.07356
2014-07-01	5.50317
2014-10-01	5.43278
2015-01-01	4.10567
2015-04-01	4.17022