Year Index 2010=1, Trend 1970-01-01 0.0635646102348556 1971-01-01 0.0716084602376037 1972-01-01 0.0771569419405106 1973-01-01 0.0859775578765545 1974-01-01 0.0973646883262841 1975-01-01 0.1239689355513400 1976-01-01 0.1349809816840010 1977-01-01 0.1523817268075000 1978-01-01 0.1724803730067760 1979-01-01 0.1965334764819600 1980-01-01 0.2377078198073470 1981-01-01 0.2662198661317880 1982-01-01 0.2930691554448490 1983-01-01 0.3226779714598910 1984-01-01 0.3521705711417840 1985-01-01 0.3859785705684630 1986-01-01 0.4023748137135390 1987-01-01 0.4319744956384080 1988-01-01 0.4599397799571300 1989-01-01 0.5133131318245380 1990-01-01 0.5770498399274560 1991-01-01 0.6260179347594320 1992-01-01 0.6522133300356730 1993-01-01 0.6478273869276340 1994-01-01 0.6412267772536060 1995-01-01 0.6520008658239440 1996-01-01 0.6734119757050620 1997-01-01 0.7074780130987260 1998-01-01 0.7419583121640960 1999-01-01 0.7701729025273710 2000-01-01 0.8079550283687020 2001-01-01 0.8424674681554720 2002-01-01 0.8647250660316980 2003-01-01 0.8887739965580100 2004-01-01 0.9125291253037480 2005-01-01 0.9208577047201770 2006-01-01 0.9198772754210080 2007-01-01 0.9274989237891420 2008-01-01 0.9220909243581920 2009-01-01 0.9492428356576680 2010-01-01 1.0000000000000000