Quarter	Billions of US Dollars
1991-07-01	0.02900
1991-10-01	0.05000
1992-04-01	0.30000
1992-07-01	0.74000
1993-01-01	0.50000
1994-10-01	0.65400
1995-01-01	1.24664
1995-04-01	0.75237
1995-07-01	1.78126
1995-10-01	0.40401
1996-01-01	2.84518
1996-04-01	0.13942
1996-07-01	0.81140
1996-10-01	0.86997
1997-01-01	2.84337
1997-04-01	0.10872
1997-07-01	1.49559
1997-10-01	0.38327
1998-01-01	1.61617
1998-04-01	0.06114
1998-07-01	0.00357
1999-01-01	0.11327
1999-04-01	0.79626
1999-07-01	1.94618
1999-10-01	0.16836
2000-01-01	0.19055
2000-04-01	0.99524
2000-07-01	0.37741
2000-10-01	0.80859
2001-01-01	0.60041
2001-04-01	0.58384
2001-07-01	0.39345
2001-10-01	0.00809
2002-07-01	0.62948
2003-04-01	0.02111
2003-07-01	1.92910
2003-10-01	0.67805
2004-01-01	0.00933
2004-04-01	0.53486
2004-07-01	0.23019
2005-01-01	0.01910
2006-10-01	0.05190
2007-10-01	0.04580
2008-04-01	0.22486
2008-07-01	0.05700
2012-07-01	0.25300