Quarter	Billions of US Dollars
1997-01-01	0.00600
1997-04-01	0.01103
1997-07-01	0.01103
1997-10-01	0.01103
1998-01-01	0.00503
2002-01-01	0.03660
2002-04-01	0.06894
2002-07-01	0.07108
2002-10-01	0.11001
2003-01-01	0.12929
2003-04-01	0.14264
2003-07-01	0.14630
2003-10-01	0.15675
2004-01-01	0.16086
2004-04-01	0.16024
2004-07-01	0.16160
2004-10-01	0.17531
2005-01-01	0.17274
2005-04-01	0.16537
2005-07-01	0.16783
2005-10-01	0.16717
2006-01-01	0.17187
2006-04-01	0.17688
2006-07-01	0.17707
2006-10-01	0.18436
2007-01-01	0.18769
2007-04-01	0.19079
2007-07-01	0.19957
2007-10-01	0.15291
2008-01-01	0.15869
2008-04-01	0.19937
2008-07-01	0.17859
2008-10-01	0.17447
2009-01-01	0.05867
2009-04-01	0.04379
2009-07-01	0.00926
2009-10-01	0.00926
2010-01-01	0.00926
2010-04-01	0.00926