Year Index 2010=1, Trend 1970-01-01 0.0322875813021337 1971-01-01 0.0363476067969593 1972-01-01 0.0393297041794738 1973-01-01 0.0478367501615032 1974-01-01 0.0557459480679016 1975-01-01 0.0659213184127497 1976-01-01 0.0780656213221225 1977-01-01 0.0998132107134824 1978-01-01 0.1111288201344820 1979-01-01 0.1267389388443990 1980-01-01 0.1523320145145270 1981-01-01 0.1872771649263510 1982-01-01 0.2119053230472840 1983-01-01 0.2366897970571830 1984-01-01 0.2548538466153630 1985-01-01 0.2849095144133420 1986-01-01 0.3175519096296970 1987-01-01 0.3367134268567270 1988-01-01 0.3595752036085530 1989-01-01 0.3839428577038940 1990-01-01 0.4261176137719840 1991-01-01 0.4727660256531190 1992-01-01 0.5151383054130050 1993-01-01 0.5441297591964890 1994-01-01 0.5613563014058800 1995-01-01 0.5702329609888750 1996-01-01 0.5851524112336590 1997-01-01 0.6231438821110310 1998-01-01 0.6153838186436560 1999-01-01 0.6412749752159380 2000-01-01 0.6485764544232860 2001-01-01 0.6579289378894690 2002-01-01 0.6802952561317920 2003-01-01 0.7116779712547850 2004-01-01 0.7434382298904440 2005-01-01 0.7701394570960540 2006-01-01 0.7823333076856270 2007-01-01 0.8256359680788330 2008-01-01 0.8880696106462290 2009-01-01 0.9583079759280990 2010-01-01 1.0000000000000000