Year Index 2010=1, Trend 1970-01-01 0.0859316804528956 1971-01-01 0.0953317052512842 1972-01-01 0.1055272497822500 1973-01-01 0.1204251062704830 1974-01-01 0.1469173174706380 1975-01-01 0.1731613070878180 1976-01-01 0.1865676360600390 1977-01-01 0.1870453920612340 1978-01-01 0.1932412130243400 1979-01-01 0.2105923957680600 1980-01-01 0.2268374768884260 1981-01-01 0.2592678752847750 1982-01-01 0.2785898416274100 1983-01-01 0.3048899864744670 1984-01-01 0.3484409725542540 1985-01-01 0.3738042061761320 1986-01-01 0.4031584637099860 1987-01-01 0.4393804389679090 1988-01-01 0.4733513311441800 1989-01-01 0.4989007099627870 1990-01-01 0.5073087540070810 1991-01-01 0.5104820849647270 1992-01-01 0.4972062668840020 1993-01-01 0.4734023777337300 1994-01-01 0.4826049919765990 1995-01-01 0.5477192094120890 1996-01-01 0.5603992730414140 1997-01-01 0.5783456732887720 1998-01-01 0.6095374003510420 1999-01-01 0.6632767120916660 2000-01-01 0.7179054654750720 2001-01-01 0.7894881835151240 2002-01-01 0.8091155439271100 2003-01-01 0.7841769368129190 2004-01-01 0.7747394791864380 2005-01-01 0.7918712684746180 2006-01-01 0.8230293378377000 2007-01-01 0.8894709108264930 2008-01-01 0.9736971100606360 2009-01-01 1.0151357255085700 2010-01-01 1.0000000000000000