Quarter	Billions of US Dollars
1997-10-01	0.53397
1998-01-01	0.53397
1998-04-01	0.53397
1998-07-01	0.53397
1999-07-01	0.25000
1999-10-01	1.22713
2000-01-01	1.22546
2000-04-01	1.51494
2000-07-01	1.37431
2000-10-01	0.40841
2001-01-01	0.42726
2001-04-01	0.13329
2001-07-01	0.04974
2001-10-01	1.59494
2002-01-01	1.34972
2002-04-01	2.46181
2002-07-01	2.43697
2002-10-01	1.50511
2003-01-01	1.50511
2003-04-01	0.39302
2003-07-01	0.39302
2005-07-01	0.60210
2005-10-01	0.58985
2006-01-01	0.60520
2006-04-01	0.63565
2006-07-01	0.30000
2006-10-01	0.34478
2007-01-01	1.12232
2007-04-01	1.12296
2007-07-01	0.82525
2007-10-01	0.77704
2008-01-01	2.77426
2008-04-01	3.30326
2008-07-01	3.06360
2008-10-01	3.09025
2009-01-01	1.38385
2009-04-01	1.21831
2009-07-01	1.54580
2009-10-01	2.57188
2010-01-01	3.04279
2010-04-01	2.55378
2010-07-01	2.44487
2010-10-01	1.37971
2011-01-01	1.06553
2011-04-01	2.01311
2011-07-01	3.39145
2011-10-01	3.93222
2012-01-01	8.90379
2012-04-01	7.65632
2012-07-01	6.41587
2012-10-01	4.88178
2013-01-01	3.89732
2013-04-01	5.27712
2013-07-01	6.25721
2013-10-01	6.55747
2014-01-01	2.46444
2014-04-01	2.73948
2014-07-01	2.15381
2014-10-01	2.89587
2015-01-01	6.51512
2015-04-01	5.13597