Year Percent Change at Annual Rate 1961-01-01 1.441674534995600 1962-01-01 1.228162717335290 1963-01-01 1.202800258426960 1964-01-01 1.177874113382540 1965-01-01 1.113429239817240 1966-01-01 1.028654022989710 1967-01-01 0.960691667182218 1968-01-01 0.827368228635450 1969-01-01 1.037926813272040 1970-01-01 0.895822809653339 1971-01-01 0.957342695400840 1972-01-01 0.959847690421014 1973-01-01 0.836521955751905 1974-01-01 0.955952565216549 1975-01-01 0.889573419721685 1976-01-01 0.709084825758481 1977-01-01 0.730386462097243 1978-01-01 0.736444436081783 1979-01-01 0.729132711984988 1980-01-01 0.701450632595680 1981-01-01 0.692817654348815 1982-01-01 0.632194653473903 1983-01-01 0.589107887986003 1984-01-01 0.548970239037132 1985-01-01 0.556207183108498 1986-01-01 0.589510919102935 1987-01-01 0.582118407581262 1988-01-01 0.595597676321376 1989-01-01 0.648266028666853 1990-01-01 0.704747683054947 1991-01-01 0.759430990290653 1992-01-01 0.764019446984079 1993-01-01 0.709759018448992 1994-01-01 0.654317639274922 1995-01-01 0.634082710415584 1996-01-01 0.610119903610681 1997-01-01 0.604934509860385 1998-01-01 0.575100709738791 1999-01-01 0.583807902034366 2000-01-01 0.580124903484574 2001-01-01 0.622063749730174 2002-01-01 0.617100948992871 2003-01-01 0.606876582402904 2004-01-01 0.605936884320485 2005-01-01 0.595996561592344 2006-01-01 0.616744106026815 2007-01-01 0.633123578426151 2008-01-01 0.667686399795713 2009-01-01 0.583850146194237 2010-01-01 0.519863962313536 2011-01-01 0.489393433478028 2012-01-01 0.323135214744141 2013-01-01 0.640738372355003 2014-01-01 0.355835322438523