Quarter	Billions of US Dollars
1988-07-01	-0.00703
1996-01-01	0.09000
1996-07-01	0.10000
1996-10-01	0.18348
1997-01-01	-0.03000
1997-04-01	0.78916
1997-07-01	0.13418
1997-10-01	0.04432
1998-01-01	0.00697
1998-04-01	0.00712
1998-07-01	0.00728
1998-10-01	0.00744
1999-01-01	-0.05240
1999-04-01	0.00277
1999-07-01	0.00794
1999-10-01	0.03211
2000-01-01	0.01709
2000-04-01	-0.02433
2000-07-01	0.00865
2000-10-01	0.43984
2001-01-01	0.00903
2001-04-01	0.25923
2001-07-01	-0.09057
2001-10-01	0.07964
2002-01-01	0.00985
2002-04-01	2.34607
2002-07-01	0.45529
2002-10-01	1.15401
2003-01-01	0.01074
2003-04-01	0.01097
2003-07-01	0.01121
2003-10-01	0.31146
2004-01-01	0.11171
2004-04-01	0.00240
2004-07-01	1.24723
2004-10-01	0.71205
2005-01-01	0.42277
2005-04-01	0.41854
2005-07-01	0.81333
2005-10-01	0.21362
2006-01-01	1.21392
2006-04-01	0.01422
2006-07-01	0.01453
2006-10-01	0.97737
2007-01-01	-0.08483
2007-04-01	-0.10989
2007-07-01	0.25000
2008-01-01	1.15000
2008-10-01	-0.30000
2009-01-01	-0.17000
2009-04-01	-1.02017
2009-07-01	4.06500
2009-10-01	-0.83473
2010-01-01	0.35000
2010-04-01	0.20500
2010-07-01	1.18865
2010-10-01	-0.26027
2011-01-01	-0.10000
2011-04-01	-0.87000
2011-10-01	-0.29152
2012-01-01	0.35780
2012-04-01	1.50000
2012-07-01	-0.68684
2012-10-01	0.80000
2013-01-01	-1.15000
2013-04-01	3.00000
2013-10-01	0.06000
2014-01-01	-0.14604
2014-07-01	-1.33360
2014-10-01	0.54748
2015-01-01	4.15000
2015-04-01	-0.23000