Year Percent Change at Annual Rate 1960-01-01 1.230027808165170 1961-01-01 0.644096577860598 1962-01-01 0.000000000000000 1963-01-01 -0.399896212305420 1964-01-01 -0.524018666355616 1965-01-01 -0.667723443809251 1966-01-01 -0.760998274793686 1967-01-01 -0.695251931488175 1968-01-01 -0.556105119567542 1969-01-01 0.215633506734599 1970-01-01 1.106758887389850 1971-01-01 2.160062911254450 1972-01-01 2.843144065427820 1973-01-01 3.386777873118400 1974-01-01 3.528268475042040 1975-01-01 3.133496634788460 1976-01-01 2.637482397801110 1977-01-01 2.395588142943240 1978-01-01 2.396269330971000 1979-01-01 2.947758307295000 1980-01-01 3.450250909689770 1981-01-01 4.409897074037820 1982-01-01 4.795354189194450 1983-01-01 5.026778085829070 1984-01-01 4.797136808358220 1985-01-01 4.419836622173210 1986-01-01 3.808313259536780 1987-01-01 3.473158684799340 1988-01-01 3.441654684676090 1989-01-01 4.028508987598780 1990-01-01 4.741904779254250 1991-01-01 5.506905197183280 1992-01-01 6.055715031107190 1993-01-01 6.138638842622920 1994-01-01 5.694485528883690 1995-01-01 4.912611936986770 1996-01-01 4.051931370529840 1997-01-01 3.459445115367560 1998-01-01 3.489935960486590 1999-01-01 4.283224255570810 2000-01-01 5.494481471814540 2001-01-01 6.720742504890190 2002-01-01 7.430611947690460 2003-01-01 7.391740772101090 2004-01-01 6.683191663329760 2005-01-01 5.518534294255140 2006-01-01 4.415581410316660 2007-01-01 3.546798691060980 2008-01-01 2.894164595595460 2009-01-01 2.558489351047800 2010-01-01 2.446275580626570 2011-01-01 2.350048364888230 2012-01-01 2.182063447579900 2013-01-01 2.066018953332490 2014-01-01 1.887949324406520 2015-01-01 1.762729621898830 2016-01-01 1.620509472217850 2017-01-01 1.552358242456640