Year Percent Change at Annual Rate 1961-01-01 1.893501356618270 1962-01-01 1.868810197386410 1963-01-01 1.814194769497800 1964-01-01 1.722906849164400 1965-01-01 1.607069501640300 1966-01-01 1.485942295057100 1967-01-01 1.380513928153870 1968-01-01 1.302560930971720 1969-01-01 1.260705863055340 1970-01-01 1.243377678087530 1971-01-01 1.236474907751120 1972-01-01 1.223872611778250 1973-01-01 1.208636944699630 1974-01-01 1.184502550054110 1975-01-01 1.156284627378780 1976-01-01 1.121882152102050 1977-01-01 1.092762784925340 1978-01-01 1.087927467239550 1979-01-01 1.111546634822800 1980-01-01 1.152002808389770 1981-01-01 1.208565822128160 1982-01-01 1.248355558750570 1983-01-01 1.226431622350010 1984-01-01 1.125824470071830 1985-01-01 0.975991324367428 1986-01-01 0.803349749160347 1987-01-01 0.662058734693204 1988-01-01 0.588520408076903 1989-01-01 0.609826166061623 1990-01-01 0.697452318238390 1991-01-01 0.806926515050606 1992-01-01 0.890596098582506 1993-01-01 0.935181609548238 1994-01-01 0.922715350128072 1995-01-01 0.869605499716599 1996-01-01 0.808158241121191 1997-01-01 0.762285883452890 1998-01-01 0.728202576955098 1999-01-01 0.713246555494251 2000-01-01 0.712174088712956 2001-01-01 0.712405471335259 2002-01-01 0.708141560198115 2003-01-01 0.701773244087377 2004-01-01 0.691080848828449 2005-01-01 0.678327424638269 2006-01-01 0.664100141793796 2007-01-01 0.652035497245578 2008-01-01 0.643593309864031 2009-01-01 0.641290499418815 2010-01-01 0.642146864616564 2011-01-01 0.643261490105516 2012-01-01 0.641725121930193 2013-01-01 0.632713935524777 2014-01-01 0.615138206978386 2015-01-01 0.590128358397735 2016-01-01 0.562446807388483 2017-01-01 0.535810503442718