Year Index 2010=1, Trend 1966-01-01 0.118461795231549 1967-01-01 0.125874146598144 1968-01-01 0.132471796860715 1969-01-01 0.140806724167131 1970-01-01 0.156186997243136 1971-01-01 0.170196658260837 1972-01-01 0.181119485099662 1973-01-01 0.200355591012211 1974-01-01 0.236671769659237 1975-01-01 0.272035223777027 1976-01-01 0.294755330058612 1977-01-01 0.320449361694859 1978-01-01 0.346578870098630 1979-01-01 0.368630640232838 1980-01-01 0.401160959026968 1981-01-01 0.434570250367161 1982-01-01 0.471251575654756 1983-01-01 0.501242616001757 1984-01-01 0.517662025242843 1985-01-01 0.537312757191379 1986-01-01 0.557822796142226 1987-01-01 0.601996136899262 1988-01-01 0.627108547357829 1989-01-01 0.643403060305258 1990-01-01 0.645801091890086 1991-01-01 0.662580697302136 1992-01-01 0.678134722891266 1993-01-01 0.681199352182588 1994-01-01 0.670985477762815 1995-01-01 0.680676660171255 1996-01-01 0.697166988731461 1997-01-01 0.707545754305429 1998-01-01 0.733576981835338 1999-01-01 0.746031684183603 2000-01-01 0.749624497136821 2001-01-01 0.777920357981178 2002-01-01 0.805678172767048 2003-01-01 0.824083298929068 2004-01-01 0.833381324306055 2005-01-01 0.856623945833761 2006-01-01 0.878271780031678 2007-01-01 0.916917608739716 2008-01-01 0.959565238919251 2009-01-01 0.994413134146653 2010-01-01 1.000000000000000