Year	Index 2010=1
1978-01-01	0.486092979018257
1979-01-01	0.470834404413634
1980-01-01	0.497116479621740
1981-01-01	0.549468287971321
1982-01-01	0.621367556847525
1983-01-01	0.656122062630483
1984-01-01	0.665293766460541
1985-01-01	0.670713363262902
1986-01-01	0.726412317831299
1987-01-01	0.799382288235681
1988-01-01	0.854296357693527
1989-01-01	0.870471043537995
1990-01-01	0.861028217711814
1991-01-01	0.878662645574604
1992-01-01	0.892981946051836
1993-01-01	0.868951037693660
1994-01-01	0.854159617430401
1995-01-01	0.850749781871779
1996-01-01	0.819116363011831
1997-01-01	0.812150513344498
1998-01-01	0.835262106143733
1999-01-01	0.862859912334579
2000-01-01	0.878206945760593
2001-01-01	0.896702614664545
2002-01-01	0.916345520505054
2003-01-01	0.912749512019908
2004-01-01	0.897102516764424
2005-01-01	0.903949125571205
2006-01-01	0.850924005104616
2007-01-01	0.900465530099640
2008-01-01	0.951702736339253
2009-01-01	0.990611084486956
2010-01-01	1.000000000000000