Quarter	Billions of US Dollars
1998-10-01	0.00901
1999-01-01	0.01085
1999-04-01	0.00518
1999-07-01	0.03639
1999-10-01	0.01019
2000-01-01	0.05720
2000-04-01	0.03686
2000-07-01	0.03254
2000-10-01	0.32184
2001-04-01	0.01373
2001-10-01	0.01395
2002-01-01	0.01753
2002-04-01	0.02337
2002-07-01	0.03342
2003-01-01	0.02829
2003-04-01	0.01000
2003-07-01	0.02411
2003-10-01	0.02094
2004-01-01	0.08502
2004-04-01	0.03973
2004-07-01	0.01222
2006-07-01	0.02548
2006-10-01	0.50000
2007-07-01	0.04123
2010-07-01	0.01476
2011-01-01	0.12400
2011-04-01	0.18500
2011-07-01	0.40000
2011-10-01	0.00498
2012-01-01	0.02145
2012-04-01	0.10905
2012-07-01	0.00113
2013-04-01	0.11254