Quarter	Billions of US Dollars
1993-10-01	0.043
1994-01-01	0.043
1994-04-01	0.042
1994-07-01	0.041
1994-10-01	0.057
1995-01-01	0.055
1995-04-01	0.055
1995-07-01	0.055
1995-10-01	0.053
1996-01-01	0.052
1996-04-01	0.051
1996-07-01	0.049
1996-10-01	0.048
1997-01-01	0.100
1997-04-01	0.153
1997-07-01	0.206
1997-10-01	0.252
1998-01-01	0.328
1998-04-01	0.345
1998-07-01	0.018
1998-10-01	0.102
1999-01-01	0.051
1999-04-01	0.273
1999-07-01	0.427
1999-10-01	0.126
2000-01-01	0.369
2000-04-01	0.452
2000-07-01	0.596
2000-10-01	0.398
2001-01-01	0.595
2001-04-01	0.508
2001-07-01	0.584
2001-10-01	0.547
2002-01-01	0.666
2002-04-01	0.601
2002-07-01	0.488
2002-10-01	0.478
2003-01-01	0.915
2003-04-01	0.834
2003-07-01	1.106
2003-10-01	1.196
2004-01-01	1.746
2004-04-01	1.507
2004-07-01	2.027
2004-10-01	2.529
2005-01-01	3.467
2005-04-01	3.230
2005-07-01	2.925
2005-10-01	2.251
2006-01-01	1.649
2006-04-01	1.178
2006-07-01	1.483
2006-10-01	2.538
2007-01-01	3.789
2007-04-01	5.017
2007-07-01	4.811
2007-10-01	7.177
2008-01-01	10.492
2008-04-01	11.700
2008-07-01	8.938
2008-10-01	4.538
2009-01-01	2.335
2009-04-01	2.167
2009-07-01	4.256
2009-10-01	4.902
2010-01-01	7.672
2010-04-01	6.232
2010-07-01	9.831
2010-10-01	8.565
2011-01-01	8.655
2011-04-01	5.341
2011-07-01	5.934
2011-10-01	6.402
2012-01-01	10.399
2012-04-01	8.850
2012-07-01	9.805
2012-10-01	11.820
2013-01-01	14.061
2013-04-01	12.223
2013-07-01	9.234
2013-10-01	6.803
2014-01-01	5.243
2014-04-01	5.921
2014-07-01	6.089
2014-10-01	5.232
2015-01-01	5.945