Year Index 2010=1, Trend 1970-01-01 0.272606770715639 1971-01-01 0.273427920640955 1972-01-01 0.279066636076793 1973-01-01 0.285799646059944 1974-01-01 0.327065783373705 1975-01-01 0.388735253005049 1976-01-01 0.411088502522904 1977-01-01 0.432898090788356 1978-01-01 0.457722476861648 1979-01-01 0.497997630773122 1980-01-01 0.572287832822254 1981-01-01 0.624944194406753 1982-01-01 0.717077516730809 1983-01-01 0.718162803980814 1984-01-01 0.688715957945508 1985-01-01 0.704644508849822 1986-01-01 0.732198195397537 1987-01-01 0.745040201254404 1988-01-01 0.768508132395939 1989-01-01 0.802795704028823 1990-01-01 0.837751951816835 1991-01-01 0.889568166357831 1992-01-01 0.894404893188059 1993-01-01 0.868679068018055 1994-01-01 0.844766019937681 1995-01-01 0.849979519044868 1996-01-01 0.863438663264412 1997-01-01 0.846873563689899 1998-01-01 0.847788662588155 1999-01-01 0.839461600761731 2000-01-01 0.809159054960136 2001-01-01 0.857373417504126 2002-01-01 0.873947182545216 2003-01-01 0.908489415003478 2004-01-01 0.932252017279147 2005-01-01 0.939576203753601 2006-01-01 0.964108029142648 2007-01-01 0.986674932458564 2008-01-01 1.016374555605570 2009-01-01 1.029523764088150 2010-01-01 1.000000000000000