Quarter	Billions of US Dollars
1993-07-01	0.13999
1993-10-01	0.12867
1994-01-01	0.10411
1994-04-01	0.13225
1994-07-01	0.08701
1994-10-01	0.29252
1995-01-01	0.17658
1995-04-01	0.12630
1995-07-01	0.15730
1995-10-01	0.13278
1996-01-01	0.22671
1996-04-01	0.25584
1996-07-01	0.34911
1996-10-01	0.27884
1997-01-01	0.61984
1997-04-01	0.51242
1997-07-01	0.24457
1997-10-01	0.26183
1998-01-01	0.00700
1999-01-01	0.06441
1999-10-01	0.02870
2000-01-01	0.02500
2000-07-01	0.02789
2000-10-01	0.01146
2005-10-01	0.09000
2006-01-01	0.04663
2006-04-01	0.00124
2006-07-01	0.07797
2007-01-01	0.50318
2007-04-01	0.25507
2008-04-01	0.01980
2008-07-01	0.00320
2011-01-01	0.00100
2011-04-01	0.01036
2012-01-01	0.00750
2012-04-01	0.48020
2012-07-01	0.27519
2012-10-01	0.15567
2013-01-01	0.25743
2013-04-01	0.31269
2013-07-01	0.42737
2013-10-01	0.69373
2014-01-01	1.03383
2014-04-01	0.85505
2014-07-01	0.86964
2014-10-01	0.56230
2015-01-01	0.74401
2015-04-01	0.57187