Year Index 2010=1, Trend 1970-01-01 0.269038734894331 1971-01-01 0.285585197408334 1972-01-01 0.310407870373334 1973-01-01 0.337890989139756 1974-01-01 0.379254432155699 1975-01-01 0.457141742720214 1976-01-01 0.491109329826718 1977-01-01 0.522669670330468 1978-01-01 0.562618687804688 1979-01-01 0.609017911631971 1980-01-01 0.661344889417844 1981-01-01 0.728194167677006 1982-01-01 0.792439951789181 1983-01-01 0.833385870257770 1984-01-01 0.886132361196426 1985-01-01 0.911304212393372 1986-01-01 0.937730337825092 1987-01-01 0.964684042078680 1988-01-01 0.951519282527655 1989-01-01 0.961459517244892 1990-01-01 0.990919588466071 1991-01-01 1.021026879692280 1992-01-01 1.051817225320230 1993-01-01 1.076813958061190 1994-01-01 1.042302517085270 1995-01-01 1.028969315248750 1996-01-01 1.038936767107250 1997-01-01 0.999379910327949 1998-01-01 0.964084769614940 1999-01-01 0.942016648712405 2000-01-01 0.926056148218273 2001-01-01 0.931684058605494 2002-01-01 0.947667168302073 2003-01-01 0.931041705027903 2004-01-01 0.930843533969518 2005-01-01 0.922421683346426 2006-01-01 0.934457680861386 2007-01-01 0.945472500852650 2008-01-01 0.970998402717499 2009-01-01 0.993255885089379 2010-01-01 1.000000000000000