Year Index 2010=1, Trend 1970-01-01 0.177686526338643 1971-01-01 0.188623348300623 1972-01-01 0.200333396334639 1973-01-01 0.214062189936008 1974-01-01 0.240085537114423 1975-01-01 0.285557958630812 1976-01-01 0.318041656216622 1977-01-01 0.344690543717546 1978-01-01 0.376978002066863 1979-01-01 0.413180806877053 1980-01-01 0.462506588976591 1981-01-01 0.519120641051498 1982-01-01 0.576691901628018 1983-01-01 0.624898720779773 1984-01-01 0.659946157451071 1985-01-01 0.683354064637273 1986-01-01 0.699063417362658 1987-01-01 0.708413342864589 1988-01-01 0.715545638486680 1989-01-01 0.726515913064921 1990-01-01 0.751450802549611 1991-01-01 0.772806146402244 1992-01-01 0.784227977888719 1993-01-01 0.796843330483846 1994-01-01 0.795110110304958 1995-01-01 0.800822241324469 1996-01-01 0.809407806893320 1997-01-01 0.808767268653357 1998-01-01 0.807174075326142 1999-01-01 0.812772547976862 2000-01-01 0.825357383369743 2001-01-01 0.846313493735395 2002-01-01 0.870041059255058 2003-01-01 0.886274323180658 2004-01-01 0.894766134294981 2005-01-01 0.910358652017083 2006-01-01 0.930143928019550 2007-01-01 0.942644815919183 2008-01-01 0.966438177561599 2009-01-01 0.991779362443957 2010-01-01 1.000000000000000