Quarter	Billions of US Dollars
1993-07-01	0.3150
1993-10-01	0.3918
1994-01-01	0.3676
1994-04-01	0.3184
1994-07-01	0.2870
1994-10-01	0.1917
1995-01-01	0.2332
1995-04-01	0.2378
1995-07-01	0.3684
1995-10-01	0.2122
1996-01-01	0.2552
1996-04-01	0.4141
1996-07-01	0.7412
1996-10-01	0.7519
1997-01-01	1.3127
1997-04-01	1.8040
1997-07-01	1.7388
1997-10-01	1.9800
1998-01-01	1.8916
1998-04-01	1.7602
1998-07-01	1.8150
1998-10-01	1.9095
1999-01-01	4.5280
1999-04-01	2.3578
1999-07-01	2.9150
1999-10-01	1.6173
2000-01-01	1.0977
2000-04-01	2.2113
2000-07-01	1.9621
2000-10-01	1.3975
2001-01-01	1.2593
2001-04-01	2.5140
2001-07-01	1.6546
2001-10-01	1.2998
2002-01-01	2.2152
2002-04-01	2.0642
2002-07-01	1.5583
2002-10-01	0.9949
2003-01-01	1.0417
2003-04-01	0.6113
2003-07-01	0.1913
2003-10-01	0.4794
2004-01-01	0.4692
2004-04-01	0.6929
2004-07-01	0.8598
2004-10-01	1.0451
2005-01-01	1.3809
2005-04-01	0.9305
2005-07-01	0.2104
2005-10-01	0.6423
2006-01-01	0.7894
2006-04-01	0.4633
2006-07-01	0.4128
2006-10-01	0.3322
2007-01-01	0.4056
2007-04-01	0.4768
2007-07-01	0.3837
2007-10-01	0.4506
2008-01-01	0.9507
2008-04-01	1.0132
2008-07-01	0.7175
2008-10-01	0.9333
2009-01-01	1.5089
2009-04-01	1.2977
2009-07-01	0.7576
2009-10-01	0.4917
2010-01-01	2.2100
2010-04-01	1.0257
2010-07-01	2.0401
2010-10-01	2.2648
2011-01-01	3.8175
2011-04-01	6.0432
2011-07-01	5.2882
2011-10-01	6.8394
2012-01-01	11.8326
2012-04-01	8.4528
2012-07-01	8.1080
2012-10-01	6.7478
2013-01-01	12.0208
2013-04-01	12.7454
2013-07-01	10.4261
2013-10-01	15.2470
2014-01-01	18.3008
2014-04-01	22.0977
2014-07-01	19.7203
2014-10-01	15.6676
2015-01-01	22.8536
2015-04-01	12.1972