Year Percent Change at Annual Rate 1960-01-01 4.005302951893850 1961-01-01 3.985868890488560 1962-01-01 2.505952176803840 1963-01-01 1.951916232153290 1964-01-01 1.956676631828510 1965-01-01 1.939783421013580 1966-01-01 1.943397564552940 1967-01-01 1.946094119113640 1968-01-01 2.511413137236700 1969-01-01 2.714233898840290 1970-01-01 2.734291052015990 1971-01-01 2.732954455254240 1972-01-01 2.729763579742620 1973-01-01 2.724870840522870 1974-01-01 2.718419706425130 1975-01-01 3.444434609329130 1976-01-01 3.728690270044700 1977-01-01 3.727512989651970 1978-01-01 3.721561738149280 1979-01-01 3.738753207162020 1980-01-01 3.722797701630760 1981-01-01 3.729070087253240 1982-01-01 9.706489026563780 1983-01-01 19.597266850202700 1984-01-01 19.282215629627400 1985-01-01 18.518427833259900 1986-01-01 17.507298264367700 1987-01-01 16.506789495273100 1988-01-01 13.979410628243300 1989-01-01 10.678273383437300 1990-01-01 8.183105060107290 1991-01-01 5.772978695380530 1992-01-01 3.310301791720630 1993-01-01 1.046433259668240 1994-01-01 -0.422094210858006 1995-01-01 -1.173087453441020 1996-01-01 -1.882364957131540 1997-01-01 -2.517244858291460 1998-01-01 -3.068581070344380 1999-01-01 -3.530192427627490 2000-01-01 -3.193254380122350 2001-01-01 -2.143727715197140 2002-01-01 -1.202216101965790 2003-01-01 -0.317443208940852 2004-01-01 0.550323017267274 2005-01-01 1.414675343121110 2006-01-01 1.804026197987060 2007-01-01 1.713260908455410 2008-01-01 1.616342390364050 2009-01-01 1.500129489851230 2010-01-01 1.382088438858390 2011-01-01 1.248989120474150 2012-01-01 1.117366352835870 2013-01-01 0.980352740209572 2014-01-01 0.847219769659737 2015-01-01 0.707922809835042 2016-01-01 0.612217977386481 2017-01-01 0.549366178619920