Quarter	Billions of US Dollars
1977-01-01	0.0421
1989-07-01	0.1750
1990-07-01	0.0825
1992-04-01	0.2216
1993-04-01	0.2340
1995-07-01	0.3500
1996-01-01	0.1500
1996-07-01	0.2750
1997-04-01	0.5000
1999-01-01	0.2500
1999-04-01	0.1606
2001-01-01	0.5750
2001-04-01	0.3000
2002-07-01	0.2300
2004-01-01	1.6776
2004-10-01	1.1003
2005-01-01	1.0750
2005-04-01	2.0000
2005-07-01	1.5000
2005-10-01	6.7550
2006-01-01	0.8893
2006-04-01	2.7543
2006-07-01	0.8254
2006-10-01	11.2991
2007-01-01	5.6402
2007-04-01	3.6795
2007-07-01	5.2937
2007-10-01	8.3256
2008-01-01	3.2148
2008-04-01	7.8404
2008-07-01	5.0828
2009-01-01	0.1500
2009-04-01	12.3739
2009-07-01	6.7171
2009-10-01	7.5174
2010-01-01	0.9182
2010-04-01	1.4632
2010-07-01	3.0444
2010-10-01	7.6547
2011-01-01	6.3310
2011-04-01	6.8836
2011-07-01	1.8354
2011-10-01	8.8328
2012-01-01	5.9472
2012-04-01	3.1699
2012-07-01	3.2565
2012-10-01	9.6081
2013-01-01	8.4464
2013-04-01	4.6482
2013-07-01	2.2545
2013-10-01	3.4142
2014-01-01	2.4293
2014-04-01	15.2527
2014-07-01	2.7168
2014-10-01	5.7659
2015-01-01	8.3847
2015-04-01	5.6071