Quarter	Billions of US Dollars
1998-10-01	0.00899
1999-01-01	0.01926
1999-04-01	0.01430
1999-07-01	0.01473
1999-10-01	0.01806
2000-01-01	0.04127
2000-04-01	0.04348
2000-07-01	0.04418
2000-10-01	0.00965
2001-04-01	0.01348
2001-07-01	0.01413
2001-10-01	0.01381
2002-01-01	0.02245
2002-04-01	0.02495
2002-07-01	0.03831
2002-10-01	0.03499
2003-01-01	0.04187
2003-04-01	0.05563
2003-07-01	0.06497
2003-10-01	0.07547
2004-01-01	0.09779
2004-04-01	0.10089
2004-07-01	0.10672
2004-10-01	0.11714
2005-01-01	0.05575
2005-04-01	0.01209
2006-07-01	0.02532
2006-10-01	0.02634
2007-01-01	0.02664
2007-04-01	0.02701
2007-07-01	0.04254
2007-10-01	0.04416
2008-01-01	0.04744
2008-04-01	0.04729
2014-10-01	0.04310
2015-01-01	0.03819
2015-04-01	0.07217