Year Index 2010=1, Trend 1970-01-01 0.398293333344217 1971-01-01 0.434066136395838 1972-01-01 0.454079487323336 1973-01-01 0.480990531040321 1974-01-01 0.521732128660071 1975-01-01 0.555527037254214 1976-01-01 0.564184809459283 1977-01-01 0.591646150306802 1978-01-01 0.620724927269854 1979-01-01 0.641441691082440 1980-01-01 0.695992512430829 1981-01-01 0.735385290055573 1982-01-01 0.767397556484634 1983-01-01 0.774783963703939 1984-01-01 0.778099567233334 1985-01-01 0.788112585751087 1986-01-01 0.825871112093032 1987-01-01 0.863277959974489 1988-01-01 0.864943656944102 1989-01-01 0.863790808926282 1990-01-01 0.893766111463384 1991-01-01 0.923646164793316 1992-01-01 0.995207565742568 1993-01-01 1.039724386468540 1994-01-01 1.017460734759630 1995-01-01 1.042300572739860 1996-01-01 1.054704482753000 1997-01-01 1.020744842439260 1998-01-01 1.024843201627930 1999-01-01 1.023917540934020 2000-01-01 1.006669410070510 2001-01-01 1.017019551603010 2002-01-01 1.023148875262910 2003-01-01 1.012485293429830 2004-01-01 0.974044287509496 2005-01-01 0.949531449865183 2006-01-01 0.924638825445429 2007-01-01 0.908375510021442 2008-01-01 0.947582203571563 2009-01-01 0.997970632212094 2010-01-01 1.000000000000000