Quarter	Billions of US Dollars
1993-07-01	0.47381
1993-10-01	0.13511
1994-01-01	0.41305
1994-04-01	0.21232
1994-07-01	0.23191
1994-10-01	0.16816
1995-01-01	0.15282
1995-04-01	0.14694
1995-07-01	0.18591
1995-10-01	0.15929
1996-01-01	0.11683
1996-04-01	0.29836
1996-07-01	0.18130
1996-10-01	0.23292
1997-01-01	0.20426
1997-04-01	0.22112
1997-07-01	0.31260
1997-10-01	0.25181
1998-01-01	0.21288
1998-04-01	0.23550
1998-07-01	0.24494
1998-10-01	0.35167
1999-01-01	0.38605
1999-04-01	0.27887
1999-07-01	0.33153
1999-10-01	0.29826
2000-01-01	0.36582
2000-04-01	0.24583
2000-07-01	0.29709
2000-10-01	0.27978
2001-01-01	0.29565
2001-04-01	0.36369
2001-07-01	0.29348
2001-10-01	0.31845
2002-01-01	0.29165
2002-04-01	0.24565
2002-07-01	0.31154
2002-10-01	0.28254
2003-01-01	0.57549
2003-04-01	0.35011
2003-07-01	0.40130
2003-10-01	0.44160
2004-01-01	0.50288
2004-04-01	0.57433
2004-07-01	1.47569
2004-10-01	0.66522
2005-01-01	0.74958
2005-04-01	0.72765
2005-07-01	0.74174
2005-10-01	0.90271
2006-01-01	1.15285
2006-04-01	0.59485
2006-07-01	0.70381
2006-10-01	1.04315
2007-01-01	0.71106
2007-04-01	0.57865
2007-07-01	0.76913
2007-10-01	1.00038
2008-01-01	1.58779
2008-04-01	1.41933
2008-07-01	0.53292
2008-10-01	0.45541
2009-01-01	0.45736
2009-04-01	0.48680
2009-07-01	0.46389
2009-10-01	0.48972
2010-01-01	1.05202
2010-04-01	0.51205
2010-07-01	0.74788
2010-10-01	1.10682
2011-01-01	1.13090
2011-04-01	0.71015
2011-07-01	0.91316
2011-10-01	0.69817
2012-01-01	0.76640
2012-04-01	0.64336
2012-07-01	0.87194
2012-10-01	0.82980
2013-01-01	0.43171
2013-04-01	0.72537
2013-07-01	0.40772
2013-10-01	0.33466
2014-01-01	3.37079
2014-04-01	4.08631
2014-07-01	5.48195
2014-10-01	5.19310
2015-01-01	1.19382
2015-04-01	1.89595