Quarter	Billions of US Dollars
1990-07-01	0.15984
1990-10-01	0.40161
1991-01-01	0.34945
1991-04-01	0.33113
1991-07-01	0.36077
1991-10-01	0.39578
1992-01-01	0.36525
1992-04-01	0.39293
1992-07-01	0.42574
1992-10-01	0.37175
1993-01-01	0.37168
1993-04-01	0.35541
1993-07-01	0.37039
1993-10-01	0.34756
1994-01-01	0.35889
1994-04-01	0.37612
1994-07-01	0.38756
1994-10-01	0.38743
1995-01-01	0.43366
1995-04-01	0.43366
1995-07-01	0.24673
1995-10-01	0.00004
1996-01-01	0.00004
1996-04-01	0.00004
1996-07-01	0.00004
1996-10-01	0.00004
1997-04-01	0.25000
1997-07-01	0.25000
1997-10-01	0.25000
1998-01-01	0.25000
1998-04-01	0.25000
1998-07-01	0.25000
1998-10-01	0.25000
1999-01-01	0.25000
1999-04-01	0.25000
1999-07-01	0.25000
1999-10-01	0.25000
2000-01-01	0.25000
2000-04-01	0.25000
2000-07-01	0.25000
2000-10-01	0.25000
2001-01-01	0.25000
2001-04-01	0.25000
2001-07-01	0.25000
2001-10-01	1.13130
2002-01-01	1.12240
2002-04-01	1.34750
2002-07-01	1.33600
2002-10-01	1.39870
2003-01-01	1.43950
2003-04-01	1.49270
2003-07-01	1.51520
2003-10-01	1.76300
2004-01-01	1.72240
2004-04-01	1.71550
2004-07-01	1.74090
2004-10-01	1.86210
2005-01-01	1.79640
2005-04-01	1.70920
2005-07-01	1.70420
2005-10-01	1.67970
2006-01-01	1.71040
2006-04-01	1.77130
2006-07-01	1.76600
2006-10-01	0.50000
2007-01-01	0.50000
2007-04-01	0.72959
2007-07-01	0.81194
2007-10-01	0.97107
2008-01-01	1.16410
2008-04-01	1.24091
2008-07-01	1.34388
2008-10-01	1.17110
2009-01-01	1.33479
2009-04-01	1.19592
2009-07-01	1.30680
2009-10-01	1.49807
2010-01-01	1.42484
2010-04-01	1.74754
2010-07-01	2.37531
2010-10-01	2.46775
2011-01-01	2.60526
2011-04-01	2.96174
2011-07-01	2.90691
2011-10-01	2.90137
2012-01-01	3.09381
2012-04-01	3.26565
2012-07-01	3.23564
2012-10-01	4.19887
2013-01-01	4.05989
2013-04-01	4.89927
2013-07-01	5.09095
2013-10-01	6.32622
2014-01-01	6.30793
2014-04-01	5.86280
2014-07-01	6.04804
2014-10-01	6.74608
2015-01-01	6.35479
2015-04-01	6.83929