Quarter Billions of US Dollars 1987-01-01 0.05340 1987-04-01 0.05340 1987-07-01 0.05340 1987-10-01 0.05340 1988-01-01 0.05340 1988-04-01 0.05340 1988-07-01 0.05340 1988-10-01 0.05340 1989-01-01 0.05340 1989-04-01 0.05340 1989-07-01 0.05340 1989-10-01 0.05340 1990-01-01 0.05340 1996-04-01 0.07000 1996-07-01 0.07000 1996-10-01 0.07000 1997-01-01 0.07000 1997-04-01 0.07000 1997-07-01 0.07000 1997-10-01 0.07000 1998-01-01 0.07000 1998-04-01 0.07000 1998-07-01 0.07000 1998-10-01 0.07000 1999-01-01 0.23000 1999-04-01 0.23000 1999-07-01 0.23000 1999-10-01 0.23000 2000-01-01 0.23000 2000-04-01 0.23000 2000-07-01 0.23000 2000-10-01 0.23000 2001-01-01 0.23000 2001-04-01 0.23000 2001-07-01 0.23000 2001-10-01 0.23000 2002-01-01 0.23000 2002-04-01 0.23000 2002-07-01 0.23000 2002-10-01 0.23000 2003-01-01 0.23000 2003-04-01 0.20500 2003-07-01 0.20500 2003-10-01 0.20500 2004-01-01 0.20500 2004-04-01 0.20500 2004-07-01 0.20500 2004-10-01 0.20500 2005-01-01 0.20500 2005-04-01 0.20500 2005-07-01 0.20500 2005-10-01 0.20500 2006-01-01 0.04500 2006-04-01 0.04500 2006-07-01 0.24500 2006-10-01 0.24500 2007-01-01 0.49500 2007-04-01 0.49500 2007-07-01 0.49500 2007-10-01 0.56000 2008-01-01 0.56000 2008-04-01 0.51500 2008-07-01 0.51500 2008-10-01 0.51500 2009-01-01 0.51500 2009-04-01 0.51500 2009-07-01 0.61500 2009-10-01 0.61500 2010-01-01 0.61500 2010-04-01 0.74500 2010-07-01 0.74500 2010-10-01 0.74500 2011-01-01 0.74500 2011-04-01 0.74500 2011-07-01 0.74500 2011-10-01 0.74500 2012-01-01 0.74500 2012-04-01 0.74500 2012-07-01 0.74500 2012-10-01 1.04500 2013-01-01 1.29500 2013-04-01 1.56587 2013-07-01 2.02401 2013-10-01 2.47401 2014-01-01 2.47401 2014-04-01 2.37401 2014-07-01 2.37401 2014-10-01 2.44923 2015-01-01 2.31923 2015-04-01 2.31923