Year Percent Change at Annual Rate 1960-01-01 3.16121598838949 1961-01-01 3.16994894027910 1962-01-01 3.13851667494880 1963-01-01 3.02990131898133 1964-01-01 2.83289446441142 1965-01-01 2.59160719608824 1966-01-01 2.31324644593031 1967-01-01 2.08745289115845 1968-01-01 2.00979043243374 1969-01-01 2.12215336689822 1970-01-01 2.34955051262799 1971-01-01 2.64348056385283 1972-01-01 2.86214840192661 1973-01-01 2.89205974737242 1974-01-01 2.68202010840182 1975-01-01 2.33736412101002 1976-01-01 1.93474854410651 1977-01-01 1.64665096563449 1978-01-01 1.60250589737202 1979-01-01 1.87783952460688 1980-01-01 2.35343877807122 1981-01-01 2.87959936475757 1982-01-01 3.27823513553108 1983-01-01 3.48164130339736 1984-01-01 3.43773533171991 1985-01-01 3.23729674205607 1986-01-01 3.00611423236535 1987-01-01 2.83712873374536 1988-01-01 2.72780435678415 1989-01-01 2.70351705100189 1990-01-01 2.73306574674798 1991-01-01 2.77257299088246 1992-01-01 2.78242964086772 1993-01-01 2.75893809499700 1994-01-01 2.69198806329189 1995-01-01 2.60083964661883 1996-01-01 2.50493307399844 1997-01-01 2.43271691954258 1998-01-01 2.39976912858939 1999-01-01 2.41626872357311 2000-01-01 2.46508842286575 2001-01-01 2.51753848907950 2002-01-01 2.55651282221105 2003-01-01 2.58742762671602 2004-01-01 2.60555785529895 2005-01-01 2.61238464706914 2006-01-01 2.61799544372365 2007-01-01 2.61893734965616 2008-01-01 2.60207261186049 2009-01-01 2.56437492095619 2010-01-01 2.51282973900612 2011-01-01 2.45687994904856 2012-01-01 2.40402832192708 2013-01-01 2.35498687464052 2014-01-01 2.31233604659415 2015-01-01 2.27438031073102 2016-01-01 2.23673796498606 2017-01-01 2.19818485041117