Year Percent Change at Annual Rate 1960-01-01 1.59489481021604 1961-01-01 1.56676620301575 1962-01-01 1.56339027804759 1963-01-01 1.59673387607258 1964-01-01 1.67328370489556 1965-01-01 1.78565315801257 1966-01-01 1.93559666443786 1967-01-01 2.06804679388517 1968-01-01 2.14363310058558 1969-01-01 2.13060313343050 1970-01-01 2.07702595322940 1971-01-01 1.97554079408721 1972-01-01 1.93768605271875 1973-01-01 2.05739887299391 1974-01-01 2.38565101854698 1975-01-01 2.83270220362223 1976-01-01 3.31157480460948 1977-01-01 3.67188797826872 1978-01-01 3.81676593746393 1979-01-01 3.70299172564800 1980-01-01 3.43083761363159 1981-01-01 3.12671868915169 1982-01-01 2.89833987636649 1983-01-01 2.76018137945076 1984-01-01 2.74973968207678 1985-01-01 2.81724046926510 1986-01-01 2.89107456526623 1987-01-01 2.93496135478020 1988-01-01 2.95829800971508 1989-01-01 2.96341493968414 1990-01-01 2.94933029459299 1991-01-01 2.93940962683441 1992-01-01 2.92377158819504 1993-01-01 2.89637078628974 1994-01-01 2.85313319054025 1995-01-01 2.79796553829058 1996-01-01 2.74554833275164 1997-01-01 2.69070725873939 1998-01-01 2.64077043753183 1999-01-01 2.57868617903341 2000-01-01 2.52234002212069 2001-01-01 2.46423789126915 2002-01-01 2.41550726459531 2003-01-01 2.38271342145356 2004-01-01 2.37499080608318 2005-01-01 2.38236695500082 2006-01-01 2.39064348989817 2007-01-01 2.39671736558493 2008-01-01 2.40362836509593 2009-01-01 2.40871905647315 2010-01-01 2.41254187719426 2011-01-01 2.41757407753107 2012-01-01 2.41881934220997 2013-01-01 2.40661062566515 2014-01-01 2.38337335884995 2015-01-01 2.34769949129974 2016-01-01 2.31119138125652 2017-01-01 2.27544481582807