Quarter	Billions of US Dollars
1993-07-01	0.46300
1993-10-01	0.67600
1994-01-01	0.98076
1994-04-01	0.79529
1994-07-01	0.74214
1994-10-01	1.12198
1995-01-01	0.38387
1995-04-01	0.88062
1995-07-01	0.63209
1995-10-01	1.24071
1996-01-01	0.67948
1996-04-01	1.08729
1996-07-01	0.88830
1996-10-01	0.70753
1997-01-01	0.45946
1997-04-01	0.44551
1997-07-01	0.51203
1997-10-01	0.38912
1998-01-01	0.43332
1998-04-01	0.28001
1998-07-01	0.38275
1998-10-01	0.22784
1999-01-01	0.23928
1999-04-01	0.46354
1999-07-01	0.14829
1999-10-01	0.40554
2000-01-01	0.20720
2000-04-01	0.12034
2000-07-01	0.34713
2000-10-01	0.17154
2001-01-01	0.13223
2001-04-01	0.04167
2001-07-01	0.00549
2001-10-01	0.00850
2002-04-01	0.01000
2004-10-01	0.03500
2005-04-01	0.02707
2008-04-01	0.06500
2011-10-01	0.08500