Year Percent Change at Annual Rate 1960-01-01 10.297808817706300 1961-01-01 11.121977885436700 1962-01-01 11.569533064932200 1963-01-01 11.596311757635000 1964-01-01 11.275758781714200 1965-01-01 10.762399318890700 1966-01-01 10.285798877998100 1967-01-01 9.819062805579960 1968-01-01 9.214821370174200 1969-01-01 8.486371129471420 1970-01-01 7.742672984707690 1971-01-01 7.028498760493360 1972-01-01 6.459999399287820 1973-01-01 6.117869815193940 1974-01-01 6.013916391311980 1975-01-01 6.043328745747480 1976-01-01 6.081767043693760 1977-01-01 6.040722511594120 1978-01-01 5.920288851614940 1979-01-01 5.705853021763650 1980-01-01 5.438089229454230 1981-01-01 5.021676189316680 1982-01-01 4.626142833292370 1983-01-01 4.484909190400170 1984-01-01 4.647564246422750 1985-01-01 4.900257964022480 1986-01-01 5.433969499809850 1987-01-01 5.648889858089500 1988-01-01 4.826771111917480 1989-01-01 2.807223431135220 1990-01-01 0.127867047148911 1991-01-01 -3.093341271026700 1996-01-01 1.300848502873920 1997-01-01 4.994922411326870 1998-01-01 6.818538527489240 1999-01-01 6.366487342187720 2000-01-01 4.675477831810540 2001-01-01 2.818102229953750 2002-01-01 1.621313483146110 2003-01-01 1.172528493183120 2004-01-01 1.773886790600840 2005-01-01 3.063370342117390 2006-01-01 4.325451802189020 2007-01-01 5.170607980650480 2008-01-01 5.778846676305010 2009-01-01 6.091830378457030 2010-01-01 6.161251140177920 2011-01-01 6.237724519843510 2012-01-01 6.211718823311330 2013-01-01 5.801761584274000 2014-01-01 4.988681412746670 2015-01-01 3.974069259963280 2016-01-01 2.924206193660230 2017-01-01 2.050208627422050