Quarter	Billions of US Dollars
1993-07-01	8.8182
1993-10-01	8.3174
1994-01-01	7.6611
1994-04-01	7.8703
1994-07-01	8.8951
1994-10-01	14.7295
1995-01-01	14.3827
1995-04-01	14.0446
1995-07-01	13.6498
1995-10-01	12.2958
1996-01-01	13.3901
1996-04-01	14.2289
1996-07-01	10.8627
1996-10-01	14.9260
1997-01-01	12.8115
1997-04-01	14.7501
1997-07-01	14.8648
1997-10-01	12.2979
1998-01-01	11.3262
1998-04-01	12.2249
1998-07-01	11.5891
1998-10-01	9.7899
1999-01-01	7.8814
1999-04-01	6.5647
1999-07-01	8.0721
1999-10-01	6.6437
2000-01-01	5.6886
2000-04-01	4.6300
2000-07-01	3.8880
2000-10-01	4.0374
2001-01-01	2.7963
2001-04-01	3.1887
2001-07-01	2.6606
2001-10-01	3.7030
2002-01-01	5.4290
2002-04-01	6.4123
2002-07-01	5.6983
2002-10-01	4.8231
2003-01-01	4.1426
2003-04-01	3.2141
2003-07-01	2.7879
2003-10-01	2.6868
2004-01-01	1.3310
2004-04-01	1.4240
2004-07-01	1.4154
2004-10-01	4.0989
2005-01-01	4.2530
2005-04-01	3.9033
2005-07-01	4.1262
2005-10-01	1.8401
2006-01-01	2.1587
2006-04-01	2.1319
2006-07-01	1.9636
2006-10-01	2.5028
2007-01-01	2.8214
2007-04-01	3.2306
2007-07-01	3.0193
2007-10-01	7.0394
2008-01-01	7.7684
2008-04-01	8.9220
2008-07-01	7.6805
2008-10-01	7.5520
2009-01-01	3.6385
2009-04-01	8.6451
2009-07-01	8.9883
2009-10-01	8.5918
2010-01-01	12.9833
2010-04-01	8.3799
2010-07-01	12.7270
2010-10-01	18.0189
2011-01-01	13.0914
2011-04-01	9.4877
2011-07-01	5.8132
2011-10-01	12.5016
2012-01-01	6.8106
2012-04-01	5.7230
2012-07-01	8.3549
2012-10-01	17.4856
2013-01-01	17.3966
2013-04-01	17.5093
2013-07-01	18.6291
2013-10-01	21.7188
2014-01-01	22.5137
2014-04-01	22.4778
2014-07-01	23.4414
2014-10-01	29.9602
2015-01-01	20.0871
2015-04-01	9.4470