Year Percent Change at Annual Rate 1960-01-01 3.74672254423519 1961-01-01 3.30244804063226 1962-01-01 4.82451753282139 1963-01-01 3.68192274450533 1964-01-01 3.95601646998330 1965-01-01 3.49380513612804 1966-01-01 2.54250983658102 1967-01-01 4.31775292137498 1968-01-01 2.09091972211573 1969-01-01 2.60578123867595 1970-01-01 3.31597634685525 1971-01-01 3.14439275996358 1972-01-01 2.54155549175577 1973-01-01 4.04661497664812 1974-01-01 2.97542610817927 1975-01-01 2.28347158162025 1976-01-01 2.23249111573749 1977-01-01 2.23910837884949 1978-01-01 2.10880058869326 1979-01-01 2.56835947346954 1980-01-01 2.40095040333290 1981-01-01 1.99138569400056 1982-01-01 1.87810703745630 1983-01-01 1.81912587693629 1984-01-01 1.30689178563831 1985-01-01 1.76363007780120 1986-01-01 1.54714759753579 1987-01-01 1.61517124551543 1988-01-01 1.65705755029368 1989-01-01 1.69646925735759 1990-01-01 3.09460300917429 1991-01-01 6.01700878321945 1992-01-01 3.45546689873163 1993-01-01 2.65809177916050 1994-01-01 2.58926284874797 1995-01-01 2.66828695661805 1996-01-01 2.61650594252757 1997-01-01 2.49839504329334 1998-01-01 2.28687869043162 1999-01-01 2.54643388659354 2000-01-01 2.64233191305756 2001-01-01 2.35711729946802 2002-01-01 2.01405839404727 2003-01-01 1.80551975888109 2004-01-01 1.76762364154994 2005-01-01 1.76289766113006 2006-01-01 1.76780587358185 2007-01-01 1.77610086917980 2008-01-01 1.77657910596980 2009-01-01 2.39020733801215 2010-01-01 1.82675240987847 2011-01-01 1.84807786159597 2012-01-01 1.84615132126711 2013-01-01 1.86605289478673 2014-01-01 1.91954379859591 2015-01-01 1.98128897562083 2016-01-01 1.96034896248170 2017-01-01 1.92839610371026