Year Percent Change at Annual Rate 1991-01-01 4.47788760269407 1992-01-01 4.47788607336765 1993-01-01 4.47788423489973 1994-01-01 4.47785249754387 1995-01-01 4.47787288220599 1996-01-01 4.47787800224899 1997-01-01 4.47787204469171 1998-01-01 2.55526947769926 1999-01-01 2.55526837039158 2000-01-01 2.55523569844846 2001-01-01 2.55526756987990 2002-01-01 2.55528456623402 2003-01-01 2.55524755562296 2004-01-01 2.55527589181892 2005-01-01 2.55526237343230 2006-01-01 2.55525867519272 2007-01-01 2.55525196026943 2008-01-01 2.88242627238187 2009-01-01 2.89186775032672 2010-01-01 2.89862866566735 2011-01-01 2.99703763622659 2012-01-01 3.00626405051232 2013-01-01 2.98461605356810 2014-01-01 2.95799495489124 2015-01-01 2.92469071065949 2016-01-01 2.88469293512819 2017-01-01 2.88469662660913