Year Index 2010=1, Trend 1970-01-01 0.210054002862216 1971-01-01 0.228847258831321 1972-01-01 0.239292729899322 1973-01-01 0.247152875900423 1974-01-01 0.298207964948905 1975-01-01 0.356500905473375 1976-01-01 0.385892544548097 1977-01-01 0.414075271622897 1978-01-01 0.415274409038389 1979-01-01 0.425076205200437 1980-01-01 0.449631741215481 1981-01-01 0.493235075032918 1982-01-01 0.520616370902512 1983-01-01 0.547463777924576 1984-01-01 0.566395948399257 1985-01-01 0.581971028306164 1986-01-01 0.569260243608988 1987-01-01 0.578053295628314 1988-01-01 0.564338516062505 1989-01-01 0.578638796126425 1990-01-01 0.597391164987514 1991-01-01 0.608551656631593 1992-01-01 0.641724336612009 1993-01-01 0.657199491374700 1994-01-01 0.668597922260175 1995-01-01 0.684451562494094 1996-01-01 0.702556641314709 1997-01-01 0.707305293009321 1998-01-01 0.700893658186334 1999-01-01 0.697139640830805 2000-01-01 0.733860087570488 2001-01-01 0.775263798491297 2002-01-01 0.793880496223091 2003-01-01 0.806125208628018 2004-01-01 0.815727821206306 2005-01-01 0.833800377235270 2006-01-01 0.843188435826612 2007-01-01 0.851637718657774 2008-01-01 0.907718687888733 2009-01-01 0.981431487509244 2010-01-01 1.000000000000000