Quarter Billions of US Dollars 1996-10-01 0.2000 1997-01-01 0.2000 1997-04-01 0.2000 1997-07-01 0.2000 1997-10-01 0.5500 1998-01-01 0.5500 1998-04-01 0.5500 1998-07-01 0.5500 1998-10-01 0.5500 1999-01-01 0.5500 1999-04-01 0.5500 1999-07-01 0.5500 1999-10-01 0.6500 2000-01-01 0.6500 2000-04-01 1.0000 2000-07-01 1.0000 2000-10-01 1.0000 2001-01-01 1.0000 2001-04-01 1.0000 2001-07-01 1.1500 2001-10-01 1.1500 2002-01-01 1.1500 2002-04-01 1.1500 2002-07-01 1.1500 2002-10-01 0.9000 2003-01-01 0.9000 2003-04-01 1.0000 2003-07-01 1.0000 2003-10-01 1.0000 2004-01-01 1.2000 2004-04-01 1.5000 2004-07-01 1.5000 2004-10-01 1.6000 2005-01-01 1.8000 2005-04-01 2.4000 2005-07-01 2.4000 2005-10-01 2.8500 2006-01-01 3.2710 2006-04-01 3.8210 2006-07-01 4.5040 2006-10-01 4.7976 2007-01-01 4.8069 2007-04-01 4.4085 2007-07-01 4.4538 2007-10-01 5.1325 2008-01-01 4.9654 2008-04-01 4.6912 2008-07-01 4.6219 2008-10-01 4.4812 2009-01-01 4.1093 2009-04-01 4.1551 2009-07-01 4.6949 2009-10-01 4.7775 2010-01-01 4.7284 2010-04-01 5.2400 2010-07-01 5.3230 2010-10-01 9.1144 2011-01-01 10.2057 2011-04-01 10.4082 2011-07-01 9.6987 2011-10-01 9.6785 2012-01-01 9.6621 2012-04-01 9.7478 2012-07-01 11.1317 2012-10-01 12.9052 2013-01-01 13.8709 2013-04-01 17.6799 2013-07-01 18.1789 2013-10-01 18.6637 2014-01-01 18.6685 2014-04-01 20.5445 2014-07-01 19.4934 2014-10-01 26.1969 2015-01-01 25.4620 2015-04-01 24.6681