Quarter	Billions of US Dollars
1997-01-01	0.01844
1997-04-01	0.01575
1997-07-01	0.06761
1997-10-01	0.10450
1998-01-01	0.02622
1998-04-01	0.02100
1998-07-01	0.01400
1999-01-01	0.01935
1999-04-01	-0.04427
1999-07-01	-0.01200
1999-10-01	-0.00950
2000-01-01	-0.02013
2000-04-01	0.11612
2000-07-01	-0.01000
2000-10-01	0.18999
2001-01-01	0.11711
2001-04-01	-0.07893
2001-10-01	-0.04059
2002-01-01	-0.01314
2002-04-01	-0.00959
2002-07-01	0.00984
2003-01-01	0.32194
2003-04-01	-0.20724
2003-10-01	0.35377
2004-01-01	0.01166
2004-04-01	0.30182
2004-07-01	0.06816
2004-10-01	0.54807
2005-01-01	0.39181
2005-04-01	-0.42767
2005-07-01	-0.13412
2005-10-01	-0.03565
2006-01-01	-0.43622
2007-01-01	-0.10830
2007-04-01	-0.06741
2008-04-01	-0.01562
2009-01-01	-0.06509
2009-10-01	-1.10811