Quarter Billions of US Dollars 1993-07-01 0.6931 1993-10-01 0.6931 1994-01-01 0.6931 1994-04-01 0.6931 1994-07-01 0.6931 1994-10-01 0.6931 1995-01-01 0.6931 1995-04-01 0.6931 1995-07-01 0.6931 1995-10-01 0.6931 1996-01-01 0.6931 1996-04-01 0.6931 1996-07-01 0.6931 1996-10-01 0.6931 1997-01-01 0.6931 1997-04-01 0.6931 1997-07-01 0.6931 1997-10-01 0.6931 1998-01-01 0.6931 1998-04-01 0.6931 1998-07-01 0.6931 1998-10-01 0.6931 1999-01-01 0.6931 1999-04-01 0.6931 1999-07-01 0.6931 1999-10-01 0.6931 2000-01-01 0.6931 2000-04-01 0.6931 2000-07-01 0.6931 2000-10-01 0.6931 2001-01-01 0.6931 2001-04-01 0.6931 2001-07-01 0.6931 2001-10-01 0.6931 2002-01-01 0.6931 2002-04-01 0.6931 2002-07-01 0.6931 2002-10-01 0.7931 2003-01-01 0.7931 2003-04-01 0.8931 2003-07-01 0.8931 2003-10-01 0.8931 2004-01-01 1.0931 2004-04-01 1.1931 2004-07-01 1.1931 2004-10-01 1.3931 2005-01-01 1.5931 2005-04-01 1.9931 2005-07-01 1.9931 2005-10-01 3.3431 2006-01-01 4.1256 2006-04-01 4.9963 2006-07-01 6.5286 2006-10-01 7.5907 2007-01-01 12.2190 2007-04-01 12.9327 2007-07-01 13.5679 2007-10-01 13.8462 2008-01-01 13.9599 2008-04-01 14.0119 2008-07-01 13.4853 2008-10-01 12.7985 2009-01-01 12.0250 2009-04-01 12.4674 2009-07-01 12.3308 2009-10-01 11.7466 2010-01-01 12.4104 2010-04-01 12.1215 2010-07-01 12.6625 2010-10-01 16.5750 2011-01-01 16.9985 2011-04-01 16.9405 2011-07-01 15.0490 2011-10-01 14.9249 2012-01-01 13.4154 2012-04-01 13.6497 2012-07-01 13.7879 2012-10-01 14.5878 2013-01-01 15.4759 2013-04-01 17.2336 2013-07-01 17.0820 2013-10-01 17.0640 2014-01-01 17.0787 2014-04-01 16.8128 2014-07-01 16.2091 2014-10-01 17.1455 2015-01-01 16.6687 2015-04-01 16.1784