Year Percent Change at Annual Rate 1960-01-01 3.901718956181500 1961-01-01 2.746739470061070 1962-01-01 2.673306219706890 1963-01-01 2.720451623903310 1964-01-01 2.761970733839960 1965-01-01 2.687731776374660 1966-01-01 3.261158558876080 1967-01-01 3.158157205029880 1968-01-01 3.061463581960700 1969-01-01 4.423325497682570 1970-01-01 7.410797215372180 1971-01-01 6.899287148695140 1972-01-01 4.481401578979260 1973-01-01 2.362314576343590 1974-01-01 1.926841886587700 1975-01-01 1.138532222512540 1976-01-01 1.125715452463450 1977-01-01 1.481508578514070 1978-01-01 1.096903137057390 1979-01-01 0.724640852076725 1980-01-01 1.112917607872450 1981-01-01 1.839457595339130 1982-01-01 2.115563554164990 1983-01-01 2.038114026495020 1984-01-01 1.964438066848080 1985-01-01 1.829518523000040 1986-01-01 1.860220414582520 1987-01-01 1.982131905965460 1988-01-01 1.943605837711900 1989-01-01 1.965284642531340 1990-01-01 2.368989135684990 1991-01-01 2.577967007474930 1992-01-01 2.498715148269000 1993-01-01 2.578822274196840 1994-01-01 2.666625017480020 1995-01-01 2.261522218479570 1996-01-01 1.915332709266520 1997-01-01 1.931976818913300 1998-01-01 1.898767879013880 1999-01-01 1.898762209744210 2000-01-01 1.901374378040690 2001-01-01 1.901793221297100 2002-01-01 1.898811418807030 2003-01-01 1.703765143577190 2004-01-01 1.521461098067490 2005-01-01 1.518467353831730 2006-01-01 1.495754381961910 2007-01-01 1.473710881949670 2008-01-01 1.452307683837070 2009-01-01 1.309615606991450 2010-01-01 1.533215428731420 2011-01-01 1.825085374011110 2012-01-01 1.811679043076370 2013-01-01 1.779440427694090 2014-01-01 1.655106429706820 2015-01-01 1.609804400181050 2016-01-01 1.512006216532980 2017-01-01 1.403947585781760