Year Percent Change at Annual Rate 1960-01-01 1.816076521461070 1961-01-01 1.876528345290860 1962-01-01 1.934998635935380 1963-01-01 1.992521144435500 1964-01-01 2.049423115260650 1965-01-01 2.105368750761400 1966-01-01 2.129588369970670 1967-01-01 2.146727199336480 1968-01-01 2.209331080412560 1969-01-01 2.330919024007900 1970-01-01 2.472265944697720 1971-01-01 2.587996396939220 1972-01-01 2.628656871325420 1973-01-01 2.576016675329530 1974-01-01 2.412656523822190 1975-01-01 2.157653278765400 1976-01-01 1.966302035518610 1977-01-01 1.754255498347160 1978-01-01 1.294024824659260 1979-01-01 0.519590420629167 1980-01-01 -0.439276603453853 1981-01-01 -1.478344961416340 1982-01-01 -2.358764830314880 1983-01-01 -2.867273337192020 1984-01-01 -2.800548252343080 1985-01-01 -2.216315406049090 1986-01-01 -1.556722265859840 1987-01-01 -0.850774195564767 1988-01-01 0.330911435004389 1989-01-01 2.030397862498160 1990-01-01 3.925342135994380 1991-01-01 5.900770746698100 1992-01-01 7.325447198106730 1993-01-01 7.665433430788020 1994-01-01 6.895568874959770 1995-01-01 5.572581069313490 1996-01-01 4.143162853329350 1997-01-01 3.086718671607220 1998-01-01 2.590485449152640 1999-01-01 2.820724187145030 2000-01-01 3.494658738272170 2001-01-01 4.251504112146780 2002-01-01 4.720528462499870 2003-01-01 4.818041119995670 2004-01-01 4.468918396187830 2005-01-01 3.870470159070400 2006-01-01 3.228629843190830 2007-01-01 2.755225384180670 2008-01-01 2.512573878515500 2009-01-01 2.569114318910100 2010-01-01 2.812616958880440 2011-01-01 3.095118614892000 2012-01-01 3.272702921287370 2013-01-01 3.315224130978800 2014-01-01 3.183201455236340 2015-01-01 2.943234185038060 2016-01-01 2.689163473092200 2017-01-01 2.490789561472910