Quarter	Billions of US Dollars
1998-07-01	0.18484
1998-10-01	0.21626
1999-01-01	0.20764
1999-04-01	0.20644
2000-01-01	0.16195
2000-04-01	0.16200
2000-10-01	0.08000
2001-01-01	0.08000
2001-04-01	0.08000
2001-07-01	0.08000
2002-07-01	0.00001
2002-10-01	0.00001
2003-01-01	0.00596
2003-04-01	0.00625
2003-07-01	0.00636
2003-10-01	0.00690
2005-07-01	0.14450
2005-10-01	0.14156
2006-01-01	0.14525
2006-04-01	0.15256
2010-04-01	0.24542
2010-07-01	0.27296
2010-10-01	0.26724
2011-01-01	0.28414