Quarter	Billions of US Dollars
1993-07-01	0.10000
1993-10-01	0.43920
1994-04-01	0.40500
1994-07-01	0.16000
1994-10-01	0.11500
1995-04-01	-0.00724
1995-07-01	0.39800
1995-10-01	0.11377
1996-01-01	0.07500
1996-04-01	0.44638
1996-07-01	0.02430
1996-10-01	0.63500
1997-01-01	0.73000
1997-04-01	0.24776
1997-10-01	-0.02867
1998-01-01	0.13023
1998-04-01	0.29632
1998-07-01	0.09000
1998-10-01	-0.21862
1999-04-01	0.17138
1999-07-01	0.41337
1999-10-01	-0.20363
2000-01-01	0.30000
2000-04-01	0.04665
2000-10-01	-0.20362
2001-01-01	-0.21623
2001-04-01	-0.00362
2001-07-01	0.03740
2001-10-01	0.02137
2002-01-01	-0.15000
2002-04-01	1.61902
2002-07-01	-0.68368
2002-10-01	-0.15362
2003-01-01	0.06574
2003-04-01	0.67626
2003-07-01	-0.09511
2003-10-01	0.00143
2004-01-01	-0.02881
2004-04-01	-0.14033
2004-07-01	0.06569
2004-10-01	-0.09804
2005-01-01	0.00572
2005-04-01	0.00224
2005-07-01	0.25601
2005-10-01	0.00253
2006-01-01	0.30631
2006-04-01	-0.17216
2006-07-01	-0.24568
2006-10-01	0.30678
2007-01-01	-0.19667
2007-04-01	-0.00158
2007-07-01	0.00730
2007-10-01	0.00748
2008-01-01	0.17904
2008-04-01	-0.29215
2008-07-01	0.00442
2008-10-01	0.00462
2009-01-01	0.00844
2009-04-01	0.83365
2009-07-01	-0.09114
2009-10-01	0.60908
2010-01-01	-0.23299
2010-04-01	-0.02954
2010-07-01	-0.29677
2010-10-01	0.75760
2011-01-01	0.45000
2011-04-01	0.87500
2011-07-01	-0.40000
2012-01-01	0.30000
2012-04-01	-0.00121
2013-01-01	0.44000
2013-04-01	1.05000
2013-10-01	0.40000
2014-04-01	-0.30000
2014-07-01	-0.06570
2015-04-01	-0.28950