Year Index 2010=1, Trend 1970-01-01 0.485979092606360 1971-01-01 0.519157694201379 1972-01-01 0.548696215901573 1973-01-01 0.599008369943864 1974-01-01 0.667739486104325 1975-01-01 0.755891163435599 1976-01-01 0.790433494401089 1977-01-01 0.833656420519570 1978-01-01 0.886681831327297 1979-01-01 0.887681958454003 1980-01-01 0.917358498146282 1981-01-01 0.961318309143655 1982-01-01 0.975657135700207 1983-01-01 0.950398019347071 1984-01-01 0.978987313769507 1985-01-01 0.966465900131220 1986-01-01 0.981352472648756 1987-01-01 1.012929533646910 1988-01-01 0.984281535420788 1989-01-01 1.000740740938980 1990-01-01 1.016220435605550 1991-01-01 1.064539969168950 1992-01-01 1.112389844568470 1993-01-01 1.138238522693750 1994-01-01 1.118435096730220 1995-01-01 1.076169630622470 1996-01-01 1.061141400266110 1997-01-01 1.044966483610550 1998-01-01 1.050800173185860 1999-01-01 1.034607388371820 2000-01-01 0.996036934714492 2001-01-01 1.007223922785470 2002-01-01 1.026394890499220 2003-01-01 1.030479766601750 2004-01-01 1.016698450166110 2005-01-01 1.007376970290020 2006-01-01 0.975789484261289 2007-01-01 0.954564386160423 2008-01-01 0.954593260542489 2009-01-01 0.990024694319714 2010-01-01 1.000000000000000