Year Percent Change at Annual Rate 1960-01-01 2.510850098180800 1961-01-01 2.113840284267690 1962-01-01 1.802949593505420 1963-01-01 1.702075809960910 1964-01-01 1.875708655016490 1965-01-01 2.227263560912320 1966-01-01 2.629815461026330 1967-01-01 2.946008601836040 1968-01-01 3.137389140727360 1969-01-01 3.162381501152950 1970-01-01 3.082000962060940 1971-01-01 2.985865819790520 1972-01-01 2.938633675711450 1973-01-01 2.934187541620510 1974-01-01 2.989205790065450 1975-01-01 3.081880979261960 1976-01-01 3.170450092037910 1977-01-01 3.238590508149260 1978-01-01 3.303747382226990 1979-01-01 3.364058123448090 1980-01-01 3.416012952632270 1981-01-01 3.334666309525110 1982-01-01 3.226571815533430 1983-01-01 3.302155383653500 1984-01-01 3.605455458144960 1985-01-01 3.969872098627910 1986-01-01 4.591644240700300 1987-01-01 4.939571299956990 1988-01-01 4.332043236472320 1989-01-01 2.609249521604560 1990-01-01 0.273598814884366 1991-01-01 -2.576356191827020 1992-01-01 -5.089333235096460 1993-01-01 -6.184856804975810 1994-01-01 -4.792691329203580 1995-01-01 -1.290822975472640 1996-01-01 3.107219638579130 1997-01-01 6.446740445465800 1998-01-01 7.917891725982510 1999-01-01 7.283968219329890 2000-01-01 5.539102032988890 2001-01-01 3.714287868734800 2002-01-01 2.452438453082690 2003-01-01 1.674485998535690 2004-01-01 1.578336720046360 2005-01-01 1.946106524708200 2006-01-01 2.361262372373020 2007-01-01 2.582133727289690 2008-01-01 2.722791296273910 2009-01-01 2.735944971284240 2010-01-01 2.664241480293030 2011-01-01 2.593509790978990 2012-01-01 2.560881302654100 2013-01-01 2.528714855545970 2014-01-01 2.500796530015800 2015-01-01 2.474094536665550 2016-01-01 2.445904866810570 2017-01-01 2.411623340226220