Year Index 2010=1, Trend 1970-01-01 0.0839865916075332 1971-01-01 0.0948369674236527 1972-01-01 0.0964377291933537 1973-01-01 0.1034749849608640 1974-01-01 0.1241492749194700 1975-01-01 0.1594990647102030 1976-01-01 0.1732504929295470 1977-01-01 0.1992010851624140 1978-01-01 0.2181054410533660 1979-01-01 0.2423374546922330 1980-01-01 0.2698076466394040 1981-01-01 0.3230704816856070 1982-01-01 0.3767692696794280 1983-01-01 0.4240632393565210 1984-01-01 0.4527892907802950 1985-01-01 0.4820810978799940 1986-01-01 0.5086626807157860 1987-01-01 0.5233112780039210 1988-01-01 0.5416736918612910 1989-01-01 0.5762151453259800 1990-01-01 0.6213951368387530 1991-01-01 0.6722160015923510 1992-01-01 0.6897419648161900 1993-01-01 0.7073631624634020 1994-01-01 0.6878616151720490 1995-01-01 0.6941882740737940 1996-01-01 0.7296662936491620 1997-01-01 0.7446979620715150 1998-01-01 0.7425240961190060 1999-01-01 0.7546657203767600 2000-01-01 0.7398813628692540 2001-01-01 0.7616050493997270 2002-01-01 0.7925899772653700 2003-01-01 0.8386636547655640 2004-01-01 0.8552474049053620 2005-01-01 0.8687965107100490 2006-01-01 0.8741723368645410 2007-01-01 0.8937020971734880 2008-01-01 0.9623795087946330 2009-01-01 1.0052761647219000 2010-01-01 1.0000000000000000