Quarter	Billions of US Dollars
1993-07-01	0.406
1993-10-01	0.100
1994-01-01	0.301
1994-04-01	0.515
1994-07-01	0.518
1994-10-01	1.363
1995-01-01	2.219
1995-04-01	2.431
1995-07-01	2.775
1995-10-01	2.127
1996-01-01	1.288
1996-04-01	1.247
1996-07-01	1.408
1996-10-01	1.353
1997-01-01	1.306
1997-04-01	2.031
1997-07-01	1.940
1997-10-01	2.069
1998-01-01	2.432
1998-04-01	1.853
1998-07-01	1.433
1998-10-01	1.734
1999-01-01	1.451
1999-04-01	1.383
1999-07-01	1.972
1999-10-01	1.313
2000-01-01	1.232
2000-04-01	1.122
2000-07-01	1.368
2000-10-01	1.807
2001-01-01	1.592
2001-04-01	2.467
2001-07-01	2.037
2001-10-01	2.068
2002-01-01	2.608
2002-04-01	2.141
2002-07-01	1.966
2002-10-01	1.566
2003-01-01	1.088
2003-04-01	1.456
2003-07-01	1.441
2003-10-01	2.212
2004-01-01	2.560
2004-04-01	2.304
2004-07-01	2.433
2004-10-01	2.505
2005-01-01	2.420
2005-04-01	2.398
2005-07-01	2.150
2005-10-01	2.388
2006-01-01	2.605
2006-04-01	3.436
2006-07-01	3.457
2006-10-01	3.382
2007-01-01	3.928
2007-04-01	2.811
2007-07-01	2.746
2007-10-01	2.249
2008-01-01	1.509
2008-04-01	3.003
2008-07-01	4.675
2008-10-01	4.880
2009-01-01	5.455
2009-04-01	5.644
2009-07-01	5.762
2009-10-01	5.681
2010-01-01	5.120
2010-04-01	6.011
2010-07-01	6.487
2010-10-01	8.112
2011-01-01	11.048
2011-04-01	14.781
2011-07-01	15.647
2011-10-01	19.073
2012-01-01	27.348
2012-04-01	29.990
2012-07-01	29.949
2012-10-01	38.118
2013-01-01	48.092
2013-04-01	58.219
2013-07-01	70.598
2013-10-01	77.586
2014-01-01	93.743
2014-04-01	102.491
2014-07-01	107.954
2014-10-01	108.507
2015-01-01	108.980
2015-04-01	112.607