Year Index 2010=1, Trend 1970-01-01 0.277831428778956 1971-01-01 0.304069006388662 1972-01-01 0.319741955094105 1973-01-01 0.348093586602451 1974-01-01 0.388014673861453 1975-01-01 0.414158638186523 1976-01-01 0.436601236079327 1977-01-01 0.448159831614494 1978-01-01 0.459765837798169 1979-01-01 0.475641547620900 1980-01-01 0.500761725291554 1981-01-01 0.523211991453540 1982-01-01 0.539506844349288 1983-01-01 0.546456208786250 1984-01-01 0.552962917655108 1985-01-01 0.563629726831420 1986-01-01 0.571242767820697 1987-01-01 0.581604971763595 1988-01-01 0.589703446080837 1989-01-01 0.598600910070248 1990-01-01 0.611030373165396 1991-01-01 0.643920032114679 1992-01-01 0.695173909458833 1993-01-01 0.722491303163728 1994-01-01 0.741122494596955 1995-01-01 0.745211734310376 1996-01-01 0.744213924526999 1997-01-01 0.756406362392603 1998-01-01 0.783829668621264 1999-01-01 0.819387648478416 2000-01-01 0.858195966384575 2001-01-01 0.874738283379235 2002-01-01 0.883979158272930 2003-01-01 0.906298674363094 2004-01-01 0.937463580590084 2005-01-01 0.942804387899592 2006-01-01 0.932528951709931 2007-01-01 0.941220283045597 2008-01-01 0.963867762984666 2009-01-01 0.987111252363284 2010-01-01 1.000000000000000