Year Percent Change at Annual Rate 1960-01-01 3.54042565824538 1961-01-01 3.31041578218961 1962-01-01 3.07907903241424 1963-01-01 2.84461397914952 1964-01-01 2.62987177756938 1965-01-01 2.45423019024318 1966-01-01 2.29381040436863 1967-01-01 2.20871544293143 1968-01-01 2.31410118542293 1969-01-01 2.65078368618632 1970-01-01 3.13510991046623 1971-01-01 3.56087395248622 1972-01-01 3.93539069853296 1973-01-01 4.42675148753775 1974-01-01 5.04097051662373 1975-01-01 5.64597309071190 1976-01-01 6.25650357943925 1977-01-01 6.62095793139336 1978-01-01 6.48054517820209 1979-01-01 5.80257040760110 1980-01-01 4.86515195330556 1981-01-01 3.87837296324072 1982-01-01 3.11312258295126 1983-01-01 2.68521918163552 1984-01-01 2.68107503092179 1985-01-01 2.95258771464071 1986-01-01 3.29536261993216 1987-01-01 3.51124794367009 1988-01-01 3.55089675575414 1989-01-01 3.35826429285365 1990-01-01 3.03824413546607 1991-01-01 2.75130310663269 1992-01-01 2.57979630120504 1993-01-01 2.47836719697988 1994-01-01 2.46374364158573 1995-01-01 2.53515144840593 1996-01-01 2.62084896042997 1997-01-01 2.77148408688515 1998-01-01 3.10657167451900 1999-01-01 3.65456463232564 2000-01-01 4.31513063667666 2001-01-01 4.83663411230383 2002-01-01 5.24990773626416 2003-01-01 5.75681491040420 2004-01-01 6.36025628989307 2005-01-01 6.90436425483572 2006-01-01 7.49936408958886 2007-01-01 7.77373699950485 2008-01-01 7.32246983377223 2009-01-01 6.12806225768925 2010-01-01 4.60390525330931 2011-01-01 2.97005195448971 2012-01-01 1.70243546748316 2013-01-01 1.16179907111335 2014-01-01 1.58280223356287 2015-01-01 2.61866519263615 2016-01-01 3.81279679337586 2017-01-01 4.62170395867266