Year Percent Change at Annual Rate 1960-01-01 1.206635018564880 1961-01-01 1.375660673486480 1962-01-01 1.529550212266130 1963-01-01 1.606416280092530 1964-01-01 1.577897549850360 1965-01-01 1.478767046552450 1966-01-01 1.357170353450660 1967-01-01 1.272577207288400 1968-01-01 1.243933622510970 1969-01-01 1.294205594425360 1970-01-01 1.394300662459160 1971-01-01 1.515350091515970 1972-01-01 1.605309394679490 1973-01-01 1.633857761046650 1974-01-01 1.580668584611970 1975-01-01 1.475669580244860 1976-01-01 1.339681672216610 1977-01-01 1.230930449103570 1978-01-01 1.200434270947500 1979-01-01 1.275323689468600 1980-01-01 1.413285747439020 1981-01-01 1.584116886452840 1982-01-01 1.702940603096590 1983-01-01 1.700598070400390 1984-01-01 1.539806965703550 1985-01-01 1.277713218062660 1986-01-01 0.982145851125644 1987-01-01 0.740733346975594 1988-01-01 0.597343427748737 1989-01-01 0.590930672741938 1990-01-01 0.683865659151401 1991-01-01 0.798988459577734 1992-01-01 0.882986989297851 1993-01-01 0.945478147783712 1994-01-01 0.970332280462307 1995-01-01 0.965894178955165 1996-01-01 0.962977246221911 1997-01-01 0.964655691176539 1998-01-01 0.944181087006946 1999-01-01 0.896456019470282 2000-01-01 0.830808071313104 2001-01-01 0.755439368705711 2002-01-01 0.686280871283504 2003-01-01 0.631109183796063 2004-01-01 0.597874931557376 2005-01-01 0.580841870893808 2006-01-01 0.566981939423216 2007-01-01 0.548725975116231 2008-01-01 0.526630114801646 2009-01-01 0.499089020616350 2010-01-01 0.467082082457756 2011-01-01 0.435051015549886 2012-01-01 0.405574329613825 2013-01-01 0.379954149475738 2014-01-01 0.359825054213810 2015-01-01 0.343459142543865 2016-01-01 0.327499919454895 2017-01-01 0.309928736523676