Year Index 2010=1, Trend 1970-01-01 0.0732900405461457 1971-01-01 0.0786741175743895 1972-01-01 0.0851349316424101 1973-01-01 0.0956331108290089 1974-01-01 0.1085454992612050 1975-01-01 0.1406201093115550 1976-01-01 0.1610696645682640 1977-01-01 0.1936765346817270 1978-01-01 0.2156901355279320 1979-01-01 0.2431721711973570 1980-01-01 0.2899268083631050 1981-01-01 0.3514290796028830 1982-01-01 0.4208436770173740 1983-01-01 0.4797475656534080 1984-01-01 0.5260556305309180 1985-01-01 0.5726221955288940 1986-01-01 0.5978556014910410 1987-01-01 0.6189633944049750 1988-01-01 0.6365814143882330 1989-01-01 0.6700660160995440 1990-01-01 0.7194954927151130 1991-01-01 0.7749881572493640 1992-01-01 0.8102411512193860 1993-01-01 0.8023312852227010 1994-01-01 0.7738148591580900 1995-01-01 0.7764199928587380 1996-01-01 0.8034310322805740 1997-01-01 0.8121321479478360 1998-01-01 0.8056542843171950 1999-01-01 0.8311714797845130 2000-01-01 0.8038652035025680 2001-01-01 0.8171240652688980 2002-01-01 0.8483725703884620 2003-01-01 0.8838631291599460 2004-01-01 0.8832358270452240 2005-01-01 0.9066862639473160 2006-01-01 0.9159292287451130 2007-01-01 0.9310135150840030 2008-01-01 0.9609907203821480 2009-01-01 1.0152295709419100 2010-01-01 1.0000000000000000