Quarter	Billions of US Dollars
1993-07-01	0.61116
1993-10-01	0.86014
1994-01-01	0.70691
1994-04-01	0.88171
1994-07-01	1.19202
1994-10-01	1.11942
1995-01-01	1.40553
1995-04-01	1.34053
1995-07-01	1.18931
1995-10-01	1.23445
1996-01-01	1.58212
1996-04-01	1.37771
1996-07-01	0.58969
1996-10-01	1.92248
1997-01-01	1.97275
1997-04-01	1.63238
1997-07-01	1.19303
1997-10-01	1.73766
1998-01-01	1.51431
1998-04-01	1.25151
1998-07-01	1.18388
1998-10-01	1.22563
1999-01-01	1.39860
1999-04-01	1.11629
1999-07-01	1.42599
1999-10-01	1.61994
2000-01-01	1.69362
2000-04-01	1.36417
2000-07-01	0.69214
2000-10-01	1.60299
2001-01-01	2.23928
2001-04-01	2.50423
2001-07-01	2.25501
2001-10-01	1.95413
2002-01-01	1.81603
2002-04-01	2.20156
2002-07-01	2.47163
2002-10-01	1.90200
2003-01-01	3.88745
2003-04-01	3.39769
2003-07-01	2.72803
2003-10-01	2.79113
2004-01-01	4.02155
2004-04-01	5.08360
2004-07-01	5.45419
2004-10-01	8.12416
2005-01-01	8.42337
2005-04-01	6.53212
2005-07-01	6.39070
2005-10-01	6.06105
2006-01-01	5.92861
2006-04-01	6.31736
2006-07-01	6.32663
2006-10-01	5.23452
2007-01-01	4.34630
2007-04-01	4.90574
2007-07-01	5.13795
2007-10-01	6.25484
2008-01-01	8.92261
2008-04-01	5.34134
2008-07-01	5.71470
2008-10-01	4.34243
2009-01-01	4.47878
2009-04-01	5.16568
2009-07-01	3.10562
2009-10-01	2.95937
2010-01-01	1.50402
2010-04-01	0.86974
2010-07-01	0.39500
2010-10-01	1.17752
2011-01-01	1.81356
2011-04-01	1.87045
2011-07-01	2.10838
2011-10-01	2.78436
2012-01-01	2.79271
2012-04-01	2.36251
2012-07-01	2.43654
2012-10-01	1.31240
2013-01-01	0.82605
2013-04-01	0.61665
2013-07-01	0.81467
2013-10-01	2.13639
2014-01-01	2.07492
2014-04-01	2.02151
2014-07-01	1.70722
2014-10-01	1.19860
2015-01-01	0.88126
2015-04-01	0.94942