Year Index 2010=1, Trend 1970-01-01 0.139410688881668 1971-01-01 0.154972731993903 1972-01-01 0.167132834948053 1973-01-01 0.189061849459198 1974-01-01 0.226759558342416 1975-01-01 0.281997190048637 1976-01-01 0.322224818676848 1977-01-01 0.340988581427815 1978-01-01 0.349757739910654 1979-01-01 0.371099367066776 1980-01-01 0.409715866264002 1981-01-01 0.464579109314879 1982-01-01 0.501874922641835 1983-01-01 0.536505517600343 1984-01-01 0.579353133400922 1985-01-01 0.617860671288976 1986-01-01 0.646449889365139 1987-01-01 0.676975687561682 1988-01-01 0.711008588058335 1989-01-01 0.746327953468301 1990-01-01 0.808132615911763 1991-01-01 0.862873780264942 1992-01-01 0.850228555669357 1993-01-01 0.806001104250877 1994-01-01 0.787137810765080 1995-01-01 0.803350432325454 1996-01-01 0.809371644513183 1997-01-01 0.801366929083769 1998-01-01 0.807062670709912 1999-01-01 0.814078221389523 2000-01-01 0.817424166156130 2001-01-01 0.840615303955426 2002-01-01 0.852931761646341 2003-01-01 0.866027305754212 2004-01-01 0.868328673389630 2005-01-01 0.884652601874856 2006-01-01 0.891777847042858 2007-01-01 0.893808133603246 2008-01-01 0.942402014155362 2009-01-01 0.994176099831947 2010-01-01 1.000000000000000