Quarter	Billions of US Dollars
1993-07-01	0.20077
1993-10-01	0.18797
1994-01-01	0.17310
1994-04-01	0.28270
1994-07-01	0.46388
1994-10-01	0.38652
1995-01-01	0.47747
1995-04-01	0.47815
1995-07-01	0.38741
1995-10-01	0.33734
1996-01-01	0.32767
1996-04-01	0.13481
1996-07-01	0.04480
1996-10-01	0.14800
1997-01-01	0.12000
1997-04-01	0.32113
1997-07-01	0.28049
1997-10-01	0.21958
1998-01-01	0.38794
1998-04-01	0.04021
1998-07-01	0.17183
1998-10-01	0.55852
1999-01-01	0.67571
1999-04-01	0.77043
1999-07-01	0.61616
1999-10-01	0.36216
2000-01-01	0.06299
2000-04-01	0.24139
2000-07-01	0.23281
2000-10-01	0.22367
2001-01-01	0.18751
2001-04-01	0.13305
2001-07-01	0.11082
2001-10-01	0.57330
2002-01-01	0.64758
2002-04-01	0.58115
2002-07-01	0.57971
2002-10-01	0.08341
2003-01-01	0.20001
2003-04-01	0.25101
2003-07-01	0.27430
2003-10-01	0.59201
2004-01-01	0.48105
2004-04-01	0.46465
2004-07-01	0.41022
2004-10-01	0.19448
2005-01-01	0.45694
2005-04-01	0.42889
2005-07-01	1.37022
2005-10-01	1.25801
2006-01-01	0.94728
2006-04-01	0.98991
2006-07-01	0.56970
2006-10-01	1.63582
2007-01-01	1.64793
2007-04-01	1.71324
2007-07-01	1.13034
2007-10-01	0.35051
2008-01-01	0.34827
2008-04-01	0.72438
2008-07-01	0.79918
2008-10-01	0.93244
2009-01-01	0.89164
2009-04-01	0.56536
2009-07-01	0.43929
2009-10-01	0.03259
2010-01-01	0.03217
2010-04-01	0.03386
2010-07-01	0.03597
2010-10-01	1.90664
2011-01-01	2.08200
2011-04-01	2.11784
2011-07-01	2.11448
2011-10-01	0.19232
2012-01-01	1.28082
2012-04-01	1.20805
2012-07-01	1.89768
2012-10-01	2.04336
2013-01-01	2.68569
2013-04-01	3.78298
2013-07-01	3.23059
2013-10-01	5.36129
2014-01-01	2.81018
2014-04-01	3.29609
2014-07-01	3.47651
2014-10-01	2.37385
2015-01-01	3.14029
2015-04-01	2.70769