Year Index 2005=1, Trend 1970-01-01 0.253490760682862 1971-01-01 0.277780635433904 1972-01-01 0.302259807336629 1973-01-01 0.329462605450833 1974-01-01 0.364952785870725 1975-01-01 0.409612738518142 1976-01-01 0.433686947351221 1977-01-01 0.462537449816131 1978-01-01 0.488962943761910 1979-01-01 0.515581519506518 1980-01-01 0.563716588709007 1981-01-01 0.611953909219902 1982-01-01 0.664032905092051 1983-01-01 0.698439405997043 1984-01-01 0.723399566435982 1985-01-01 0.757247996773099 1986-01-01 0.781958712988627 1987-01-01 0.801233122547685 1988-01-01 0.809713347230216 1989-01-01 0.822324521039302 1990-01-01 0.846885477400988 1991-01-01 0.881394762817240 1992-01-01 0.931274309800927 1993-01-01 0.960092530205284 1994-01-01 0.948444908289741 1995-01-01 0.948113027666777 1996-01-01 0.961944930673680 1997-01-01 0.936473973195496 1998-01-01 0.927327937371439 1999-01-01 0.942324474353758 2000-01-01 0.945239297722452 2001-01-01 0.954830994697110 2002-01-01 0.975032545322458 2003-01-01 0.993247652258721 2004-01-01 0.996152464003822 2005-01-01 1.000000000000000 2006-01-01 1.004101940744080 2007-01-01 1.009441762265740 2008-01-01 1.037269492263510 2009-01-01 1.074086094971300 2010-01-01 1.075548862834460