Year Index 2010=1, Trend 1969-01-01 0.422926929291578 1970-01-01 0.440956043223002 1971-01-01 0.468613785299021 1972-01-01 0.500164432181329 1973-01-01 0.547448778272411 1974-01-01 0.603074316068294 1975-01-01 0.625670877048413 1976-01-01 0.658010626164218 1977-01-01 0.662485073792990 1978-01-01 0.694533920351105 1979-01-01 0.718790453263949 1980-01-01 0.737238442778372 1981-01-01 0.762466905882090 1982-01-01 0.824695880889052 1983-01-01 0.813771068640613 1984-01-01 0.793986086807036 1985-01-01 0.800306562843946 1986-01-01 0.846046910335343 1987-01-01 0.863010459811523 1988-01-01 0.859598674094412 1989-01-01 0.854736145418798 1990-01-01 0.868641466063314 1991-01-01 0.891077770343394 1992-01-01 0.914982976190452 1993-01-01 0.919607517894513 1994-01-01 0.905154560291520 1995-01-01 0.896853724058942 1996-01-01 0.894846445237160 1997-01-01 0.915048855854531 1998-01-01 0.929881729865517 1999-01-01 0.935592847879636 2000-01-01 0.937923230018320 2001-01-01 0.949794813417247 2002-01-01 0.963081278961090 2003-01-01 0.972780325644234 2004-01-01 0.959268065824675 2005-01-01 0.952459366894689 2006-01-01 0.949441930501302 2007-01-01 0.963840816796376 2008-01-01 0.986611821843119 2009-01-01 1.014042068221260 2010-01-01 1.000000000000000