Quarter	Billions of US Dollars
1993-07-01	0.0642
1993-10-01	0.0751
1994-01-01	0.0631
1994-04-01	0.0350
1994-07-01	0.0347
1994-10-01	0.0365
1995-01-01	0.0721
1995-04-01	0.0720
1995-07-01	0.0422
1995-10-01	0.1424
1996-01-01	0.2000
1996-04-01	0.3336
1996-07-01	0.4532
1996-10-01	0.4477
1997-01-01	0.5196
1997-04-01	0.5070
1997-07-01	0.3823
1997-10-01	0.2880
1998-01-01	0.1999
1998-04-01	0.7562
1998-07-01	0.9088
1998-10-01	1.0205
1999-01-01	1.0394
1999-04-01	0.5381
1999-07-01	0.8781
1999-10-01	0.8210
2000-01-01	0.6499
2000-04-01	0.7675
2000-07-01	0.5704
2000-10-01	1.2798
2001-01-01	1.3709
2001-04-01	3.0331
2001-07-01	2.6872
2001-10-01	1.7932
2002-01-01	1.7952
2002-04-01	0.1969
2002-07-01	0.2567
2002-10-01	0.2569
2003-01-01	1.0781
2003-04-01	1.2105
2003-07-01	1.2559
2003-10-01	1.4718
2004-01-01	0.8835
2004-04-01	0.8196
2004-07-01	0.9471
2004-10-01	2.4292
2005-01-01	2.5319
2005-04-01	2.3213
2005-07-01	3.0227
2005-10-01	2.3676
2006-01-01	3.0872
2006-04-01	4.0583
2006-07-01	3.8898
2006-10-01	3.9755
2007-01-01	2.4221
2007-04-01	3.1802
2007-07-01	3.5918
2007-10-01	2.9712
2008-01-01	4.5771
2008-04-01	6.7777
2008-07-01	6.8993
2008-10-01	7.0027
2009-01-01	5.4655
2009-04-01	4.7808
2009-07-01	5.1392
2009-10-01	4.9023
2010-01-01	5.7947
2010-04-01	4.8050
2010-07-01	6.9725
2010-10-01	6.8185
2011-01-01	7.7927
2011-04-01	10.6120
2011-07-01	11.8606
2011-10-01	12.9063
2012-01-01	12.8674
2012-04-01	10.9333
2012-07-01	10.2332
2012-10-01	10.8870
2013-01-01	12.8875
2013-04-01	17.2760
2013-07-01	22.5389
2013-10-01	27.8432
2014-01-01	27.6189
2014-04-01	28.6009
2014-07-01	30.7809
2014-10-01	24.8897
2015-01-01	20.1127
2015-04-01	21.3429