Year Percent Change from Year Ago 1961-01-01 5.506345782299800 1962-01-01 6.672032106770210 1963-01-01 5.531062317669750 1964-01-01 6.523360806905960 1965-01-01 4.773308099675390 1966-01-01 5.215737370387660 1967-01-01 4.690049872270230 1968-01-01 4.258859218450550 1969-01-01 6.987912919090620 1970-01-01 5.732331958038740 1971-01-01 4.783215790570990 1972-01-01 4.430857864281140 1973-01-01 5.439987892720850 1974-01-01 3.109578765344360 1975-01-01 -0.278408316454124 1976-01-01 4.243828731271810 1977-01-01 3.217503935595700 1978-01-01 3.350114020638780 1979-01-01 3.241482063746960 1980-01-01 1.624298104261770 1981-01-01 1.068577252646630 1982-01-01 2.505552381952650 1983-01-01 1.240522398876430 1984-01-01 1.513633064934170 1985-01-01 1.623100303951350 1986-01-01 2.337740025124140 1987-01-01 2.561716487995720 1988-01-01 4.742870951416240 1989-01-01 4.343687607373370 1990-01-01 2.923642785626860 1991-01-01 1.048173701216460 1992-01-01 1.599339486096120 1993-01-01 -0.628599328300855 1994-01-01 2.358335954442370 1995-01-01 2.106431015855960 1996-01-01 1.413120402242590 1997-01-01 2.336168630966690 1998-01-01 3.588354194532640 1999-01-01 3.421442833333730 2000-01-01 3.923450210954120 2001-01-01 1.983784933784260 2002-01-01 1.135535763731150 2003-01-01 0.823376492197115 2004-01-01 2.829757403416670 2005-01-01 1.663273834857120 2006-01-01 2.449578261569130 2007-01-01 2.424831121414850 2008-01-01 0.254849200604109 2009-01-01 -2.873309719103180 2010-01-01 1.949187932973240 2011-01-01 2.192557515718020 2012-01-01 0.313467147543724 2013-01-01 0.576231671581954 2014-01-01 0.956183044645352 2015-01-01 1.112958858293810 2016-01-01 1.171095615706190 2017-01-01 2.160746871400610