Year Percent Change at Annual Rate 1960-01-01 0.88960902557293800 1961-01-01 2.60618832454646000 1962-01-01 0.93199469005214800 1963-01-01 1.01742951123838000 1964-01-01 1.04194368386186000 1965-01-01 1.07469426749312000 1966-01-01 0.91306448412578500 1967-01-01 0.93260531811898600 1968-01-01 0.33302638492099600 1969-01-01 2.06732034780429000 1970-01-01 1.13052183021300000 1971-01-01 1.28737935528027000 1972-01-01 1.40077918128147000 1973-01-01 0.82781391311029000 1974-01-01 1.90895684623901000 1975-01-01 1.60110037973093000 1976-01-01 0.73962003482988700 1977-01-01 0.96367575111643100 1978-01-01 0.90488069401567300 1979-01-01 0.84240947461376500 1980-01-01 0.78400759200117100 1981-01-01 0.73881665248838000 1982-01-01 0.67853727345395700 1983-01-01 0.68151104303124600 1984-01-01 0.63441329144523800 1985-01-01 0.61136867448434100 1986-01-01 0.60929987134033100 1987-01-01 0.49182513348102600 1988-01-01 0.42663854435456500 1989-01-01 0.40939466041032700 1990-01-01 0.34137059661924800 1991-01-01 0.31035594583853100 1992-01-01 0.24823708092863400 1993-01-01 0.24681941258070200 1994-01-01 0.34068578866268600 1995-01-01 0.38178960113712200 1996-01-01 0.25318888029840500 1997-01-01 0.23827121759148300 1998-01-01 0.27172961023119300 1999-01-01 0.18258637414010700 2000-01-01 0.16727557811318700 2001-01-01 0.24095258752106900 2002-01-01 0.23252718710568400 2003-01-01 0.21398094877968200 2004-01-01 0.03366225827254460 2005-01-01 0.00939209655766336 2006-01-01 0.06337358941813350 2007-01-01 0.11490884772621100 2008-01-01 0.04842539459789660 2009-01-01 -0.01249463122940960 2010-01-01 0.01796054151956440 2011-01-01 -0.18522648641084600 2012-01-01 -0.15971067584434700 2013-01-01 -0.14427188338707600 2014-01-01 -0.13269422214704200 2015-01-01 -0.10612499374674700 2016-01-01 -0.11528417705008800 2017-01-01 -0.16448403637078500