Year Percent Change from Year Ago 1961-01-01 5.681250831988130 1962-01-01 4.259234836866380 1963-01-01 5.327898335024940 1964-01-01 6.821223034889240 1965-01-01 3.821344454410600 1966-01-01 2.090898033035470 1967-01-01 3.365567370463620 1968-01-01 3.638444929202530 1969-01-01 5.009054609632750 1970-01-01 6.719463711785200 1971-01-01 0.642690977338430 1972-01-01 2.357291528216240 1973-01-01 4.208676465225910 1974-01-01 3.246910211161140 1975-01-01 2.697251669532210 1976-01-01 0.360573653569656 1977-01-01 -1.547076475065130 1978-01-01 2.031508400179290 1979-01-01 4.037575509125950 1980-01-01 1.425866434251040 1981-01-01 -0.191033692274378 1982-01-01 1.241746335773860 1983-01-01 1.877891656264310 1984-01-01 4.311720467709290 1985-01-01 2.216964531136400 1986-01-01 2.788005056534180 1987-01-01 3.400473600500710 1988-01-01 2.601605926665070 1989-01-01 2.746168799816550 1990-01-01 1.028721777442810 1991-01-01 -1.079469323821920 1992-01-01 -1.182429588963640 1993-01-01 -1.995281371638810 1994-01-01 4.087735459714620 1995-01-01 4.020053862718030 1996-01-01 1.519048870597300 1997-01-01 2.912322521497460 1998-01-01 4.240964785362840 1999-01-01 4.486709455019280 2000-01-01 4.745617911617100 2001-01-01 1.573442508036350 2002-01-01 2.075292730369810 2003-01-01 2.359785584989030 2004-01-01 4.310766660862430 2005-01-01 2.816692993676710 2006-01-01 4.699546993818840 2007-01-01 3.408104396506990 2008-01-01 -0.557036229721801 2009-01-01 -5.195888641418550 2010-01-01 5.991955116885360 2011-01-01 2.679219818270280 2012-01-01 -0.298530386261306 2013-01-01 1.238345784704740 2014-01-01 2.601898019027320 2015-01-01 4.456558659324770 2016-01-01 2.683969598501460 2017-01-01 2.114205405058220