Quarter	Billions of US Dollars
1987-01-01	0.08700
1987-04-01	0.08000
1987-07-01	0.08500
1987-10-01	0.05000
1988-01-01	0.05000
1988-04-01	0.05000
1988-07-01	0.05000
1988-10-01	0.05000
1989-01-01	0.05000
1989-04-01	0.05000
1989-07-01	0.05000
1989-10-01	0.05000
1990-01-01	0.05000
1990-04-01	0.05000
1990-07-01	0.05000
1990-10-01	0.05000
1991-01-01	0.05000
1991-04-01	0.05000
1991-07-01	0.05000
1991-10-01	0.05000
1992-01-01	0.05000
1992-04-01	0.05000
2002-01-01	0.45000
2002-04-01	0.45000
2002-07-01	0.45000
2002-10-01	0.45000
2003-01-01	0.45000
2003-04-01	0.45000
2003-07-01	0.45000
2003-10-01	0.65000
2004-01-01	0.65000
2004-04-01	0.65000
2004-07-01	0.65000
2004-10-01	0.65000
2005-01-01	0.20000
2005-04-01	0.20000
2005-07-01	0.88932
2005-10-01	0.94298
2006-01-01	1.47022
2006-04-01	0.80740
2006-07-01	0.37877
2006-10-01	0.50770
2007-01-01	0.50091
2007-04-01	0.61550
2007-07-01	0.43078
2007-10-01	0.32900
2008-01-01	0.39121
2008-04-01	0.35135
2008-07-01	0.33226
2008-10-01	0.02505
2012-04-01	0.08795
2012-07-01	0.05733
2013-07-01	0.03314
2013-10-01	0.03365
2014-01-01	0.03394
2014-04-01	0.03370
2014-07-01	0.50000
2014-10-01	0.50000
2015-01-01	0.50000
2015-04-01	0.50000