Year Index 2010=1, Trend 1970-01-01 0.462717130594052 1971-01-01 0.494307599296769 1972-01-01 0.522432224885564 1973-01-01 0.570336128347702 1974-01-01 0.635777348677303 1975-01-01 0.719709542052140 1976-01-01 0.752598463645285 1977-01-01 0.792051050893393 1978-01-01 0.851062258278602 1979-01-01 0.846209283740643 1980-01-01 0.873585763762906 1981-01-01 0.925193517088616 1982-01-01 0.946630704728356 1983-01-01 0.926321397953352 1984-01-01 0.955493513000390 1985-01-01 0.946774547138279 1986-01-01 0.963193658646065 1987-01-01 0.985215051705978 1988-01-01 0.964875361499309 1989-01-01 0.970204493887016 1990-01-01 0.989334287594312 1991-01-01 1.037163960315010 1992-01-01 1.080206704535840 1993-01-01 1.099101488397130 1994-01-01 1.088436981640480 1995-01-01 1.055250372253130 1996-01-01 1.039960557401790 1997-01-01 1.022199158384160 1998-01-01 1.021423773325770 1999-01-01 1.004087456906950 2000-01-01 0.970025018239775 2001-01-01 0.963782898420378 2002-01-01 0.975748673417070 2003-01-01 0.978177780676813 2004-01-01 0.961998313197601 2005-01-01 0.955627794987854 2006-01-01 0.937391957719944 2007-01-01 0.929556396130959 2008-01-01 0.957565466527667 2009-01-01 1.037635281817070 2010-01-01 1.000000000000000