Quarter	Billions of US Dollars
1993-07-01	0.40646
1993-10-01	0.09991
1994-01-01	0.30134
1994-04-01	0.51530
1994-07-01	0.51837
1994-10-01	1.15235
1995-01-01	1.98475
1995-04-01	2.08215
1995-07-01	2.43372
1995-10-01	2.00046
1996-01-01	1.14387
1996-04-01	1.32043
1996-07-01	1.26597
1996-10-01	0.99569
1997-01-01	0.88056
1997-04-01	1.59590
1997-07-01	1.57711
1997-10-01	1.84648
1998-01-01	2.29302
1998-04-01	1.60378
1998-07-01	1.20178
1998-10-01	1.42811
1999-01-01	1.15128
1999-04-01	1.02197
1999-07-01	1.48079
1999-10-01	0.97178
2000-01-01	0.86408
2000-04-01	0.83670
2000-07-01	1.05123
2000-10-01	1.37810
2001-01-01	1.19441
2001-04-01	1.97684
2001-07-01	1.68351
2001-10-01	1.60990
2002-01-01	1.57815
2002-04-01	0.69961
2002-07-01	0.66725
2002-10-01	0.37510
2003-01-01	0.37484
2003-04-01	0.82516
2003-07-01	0.57590
2003-10-01	0.78072
2004-01-01	0.88011
2004-04-01	0.62144
2004-07-01	0.49009
2004-10-01	0.29604
2005-01-01	0.47946
2005-04-01	0.39074
2005-07-01	0.51116
2005-10-01	0.69528
2006-01-01	0.92155
2006-04-01	0.95509
2006-07-01	1.01489
2006-10-01	0.81407
2007-01-01	0.33500
2007-04-01	0.18115
2007-07-01	0.01220
2007-10-01	0.01220
2008-01-01	0.01220
2008-04-01	0.53754
2008-07-01	1.69742
2008-10-01	1.69449
2009-01-01	1.69300
2009-04-01	1.63033
2009-07-01	2.44024
2009-10-01	2.43271
2010-01-01	2.40299
2010-04-01	1.97256
2010-07-01	2.68613
2010-10-01	2.92883
2011-01-01	3.65793
2011-04-01	4.39590
2011-07-01	1.77472
2011-10-01	1.88900
2012-01-01	1.33826
2012-04-01	0.81235
2012-07-01	1.18290
2012-10-01	1.51993
2013-01-01	2.64550
2013-04-01	4.31281
2013-07-01	5.65476
2013-10-01	6.71087
2014-01-01	6.53878
2014-04-01	5.69573
2014-07-01	6.15195
2014-10-01	7.17070
2015-01-01	8.00654
2015-04-01	8.69389