Quarter	Billions of US Dollars
1993-07-01	0.2778
1993-10-01	0.2607
1994-01-01	0.1794
1994-04-01	0.3060
1994-07-01	0.3117
1994-10-01	0.5068
1995-01-01	0.5531
1995-04-01	0.3218
1995-07-01	0.1945
1995-10-01	0.0870
1996-01-01	0.0950
1996-04-01	0.1179
1996-07-01	0.0977
1996-10-01	0.1273
1997-01-01	0.2551
1997-04-01	0.2408
1997-07-01	0.2555
1997-10-01	0.1782
1998-01-01	0.0737
1998-04-01	0.0687
1998-07-01	0.0122
1998-10-01	0.0072
1999-01-01	0.2076
1999-04-01	0.3055
1999-07-01	0.3582
1999-10-01	0.3690
2000-01-01	0.1203
2000-04-01	0.0470
2000-07-01	0.2334
2000-10-01	0.1892
2001-01-01	0.3826
2001-04-01	0.3404
2001-07-01	0.2000
2001-10-01	0.2000
2003-01-01	0.2497
2003-04-01	0.2503
2003-07-01	0.4221
2003-10-01	0.4324
2004-01-01	0.6023
2004-04-01	0.6023
2004-07-01	0.5898
2004-10-01	0.5992
2005-01-01	0.4707
2005-04-01	0.4575
2005-07-01	1.1055
2005-10-01	1.7028
2006-01-01	2.4426
2006-04-01	2.0118
2006-07-01	4.9665
2006-10-01	6.4384
2007-01-01	12.1113
2007-04-01	12.9412
2007-07-01	10.6801
2007-10-01	9.9540
2008-01-01	8.6771
2008-04-01	7.7851
2008-07-01	8.1105
2008-10-01	10.0845
2009-01-01	10.3387
2009-04-01	13.1720
2009-07-01	13.9374
2009-10-01	11.4252
2010-01-01	9.4320
2010-04-01	11.7852
2010-07-01	11.9544
2010-10-01	9.0112
2011-01-01	11.8957
2011-04-01	7.8842
2011-07-01	9.2161
2011-10-01	8.7920
2012-01-01	7.8965
2012-04-01	7.3552
2012-07-01	6.0563
2012-10-01	6.4727
2013-01-01	6.3441
2013-04-01	6.5599
2013-07-01	8.5221
2013-10-01	8.9875
2014-01-01	9.8145
2014-04-01	10.9341
2014-07-01	12.3385
2014-10-01	13.8654
2015-01-01	13.0599
2015-04-01	18.4925