Quarter	Billions of US Dollars
1998-04-01	0.02495
1998-07-01	0.00011
1998-10-01	-0.00013
1999-04-01	-0.01589
2001-07-01	0.00322
2001-10-01	0.00033
2002-07-01	-0.00304
2005-01-01	0.24759
2005-04-01	0.07350
2005-07-01	0.05525
2005-10-01	0.20519
2006-01-01	-0.04720
2006-04-01	0.01033
2006-07-01	-0.04557
2006-10-01	0.15886
2007-01-01	0.04343
2007-04-01	0.20956
2007-07-01	0.50340
2007-10-01	0.03324
2008-01-01	0.74439
2008-04-01	0.95858
2008-07-01	0.01270
2008-10-01	-1.34992
2009-01-01	-0.95774
2009-04-01	-0.21172
2009-07-01	0.07584
2009-10-01	0.11666
2010-01-01	0.09974
2010-04-01	0.00735
2010-07-01	0.05213
2010-10-01	-0.05414
2011-01-01	-0.11043
2011-04-01	0.11420
2011-07-01	0.01654
2011-10-01	0.03216
2012-01-01	0.11982
2012-04-01	-0.13814
2012-07-01	-0.00387
2012-10-01	0.06896
2013-01-01	0.01159
2013-04-01	-0.16824
2013-07-01	-0.00883
2013-10-01	0.02797
2014-01-01	0.19988
2014-04-01	-0.10149
2014-07-01	-0.15101
2014-10-01	0.11084
2015-01-01	0.12599
2015-04-01	-0.24040