Year Percent Change at Annual Rate 1961-01-01 2.30951073677832 1962-01-01 2.34811805008481 1963-01-01 2.38914568418616 1964-01-01 2.44322090430464 1965-01-01 2.50403202704975 1966-01-01 2.56809835879699 1967-01-01 2.62438173110770 1968-01-01 2.66051610214902 1969-01-01 2.67410742371335 1970-01-01 2.67356226610285 1971-01-01 2.65726161173670 1972-01-01 2.64952937776546 1973-01-01 2.67133759709188 1974-01-01 2.73565004948094 1975-01-01 2.81831964311780 1976-01-01 2.91025416270190 1977-01-01 2.96947642821095 1978-01-01 2.96388122129645 1979-01-01 2.87908628327446 1980-01-01 2.74456496337766 1981-01-01 2.61005251189124 1982-01-01 2.50254855288436 1983-01-01 2.41757672348939 1984-01-01 2.36163342677681 1985-01-01 2.33295880080303 1986-01-01 2.29345344597982 1987-01-01 2.26580687757449 1988-01-01 2.30555735862382 1989-01-01 2.42426154933271 1990-01-01 3.37681885612928 1991-01-01 2.78759403869981 1992-01-01 2.92930324252632 1993-01-01 2.97991398555757 1994-01-01 2.91594137177759 1995-01-01 2.78139187202997 1996-01-01 2.62831980055461 1997-01-01 2.51120164902432 1998-01-01 2.38300340449096 1999-01-01 2.36403211863257 2000-01-01 2.46055906450573 2001-01-01 2.53738970863000 2002-01-01 2.57332704849868 2003-01-01 2.59067248947080 2004-01-01 2.58189183852127 2005-01-01 2.55553186154170 2006-01-01 2.53162290750953 2007-01-01 2.51047708935863 2008-01-01 2.49146913619546 2009-01-01 2.46982309898685 2010-01-01 2.44905007387078 2011-01-01 2.42956709076483 2012-01-01 2.41049024955011 2013-01-01 2.39684473473918 2014-01-01 2.38288549687987 2015-01-01 2.37416275054041 2016-01-01 2.37432993934605 2017-01-01 2.36795885510392