Quarter	Billions of US Dollars
1993-07-01	0.2015
1993-10-01	-0.0325
1994-01-01	0.0307
1994-04-01	-0.2482
1997-10-01	0.1798
1998-10-01	-0.1883
2004-01-01	0.6502
2004-04-01	-0.4816
2004-10-01	0.0070
2005-01-01	-0.1578
2005-04-01	2.5179
2005-07-01	-2.4456
2006-04-01	4.4396
2006-07-01	-4.5037
2007-04-01	8.5324
2007-07-01	-3.3381
2007-10-01	-4.1596
2008-01-01	-1.5436
2008-04-01	11.0298
2008-07-01	-3.4259
2008-10-01	0.9388
2009-01-01	-0.7235
2009-04-01	5.2656
2009-07-01	3.6793
2009-10-01	-13.9757
2010-01-01	-2.3335
2010-04-01	0.6607
2010-07-01	1.2266
2010-10-01	3.3960
2011-01-01	-2.0497
2011-04-01	-1.4392
2011-10-01	12.4538
2012-01-01	5.1647
2012-04-01	-9.3651
2012-07-01	-4.4479
2012-10-01	-2.0559
2013-01-01	-3.1299
2013-04-01	9.4431
2013-07-01	-0.0035
2013-10-01	10.4528
2014-01-01	2.5134
2014-04-01	-3.2497
2014-07-01	-1.6784
2014-10-01	2.2658
2015-01-01	10.2729
2015-04-01	18.8727