Year Percent Change at Annual Rate 1960-01-01 3.508776084543430 1961-01-01 2.625906889509200 1962-01-01 1.894196338941090 1963-01-01 1.587484911054150 1964-01-01 1.765516960636920 1965-01-01 2.258542409667590 1966-01-01 2.928337012835370 1967-01-01 3.336795940623180 1968-01-01 3.605041547805160 1969-01-01 3.479587846899940 1970-01-01 3.377809699324310 1971-01-01 3.311660134254540 1972-01-01 3.412261943384920 1973-01-01 3.168637443516580 1974-01-01 2.500896924137940 1975-01-01 1.721419609236050 1976-01-01 0.770983358402561 1977-01-01 0.111530272345022 1978-01-01 0.790259802855071 1979-01-01 3.137863895853040 1980-01-01 6.457004251694950 1981-01-01 9.488025718377310 1982-01-01 11.426506526935000 1983-01-01 11.948639594559100 1984-01-01 11.251690934298200 1985-01-01 10.081824037252100 1986-01-01 8.906595859791090 1987-01-01 8.085026490528710 1988-01-01 7.415354618978720 1989-01-01 6.953490513143470 1990-01-01 6.632989697563890 1991-01-01 6.178277636187170 1992-01-01 5.733151502170420 1993-01-01 5.447901572807060 1994-01-01 5.344504277237830 1995-01-01 5.286755103566940 1996-01-01 5.338428702152440 1997-01-01 5.192647438674570 1998-01-01 4.603866085186090 1999-01-01 3.424514050249860 2000-01-01 1.956963854877160 2001-01-01 0.424604557571379 2002-01-01 -0.904813231882346 2003-01-01 -1.969443542651880 2004-01-01 -2.643577320636810 2005-01-01 -2.966053898531920 2006-01-01 -3.278563943147350 2007-01-01 -3.589464644901230 2008-01-01 -3.561054885486140 2009-01-01 -3.107097562768850 2010-01-01 -2.270801855633760 2011-01-01 -1.179202278724030 2012-01-01 -0.126506937544522 2013-01-01 0.590235022736090 2014-01-01 0.796288215489398 2015-01-01 0.636874887938042 2016-01-01 0.376915749529585 2017-01-01 0.219666594634541