Year	Index 2010=1
1978-01-01	0.384213342395920
1979-01-01	0.368399475393290
1980-01-01	0.383764932978306
1981-01-01	0.432989757447446
1982-01-01	0.464093917019455
1983-01-01	0.451660975634967
1984-01-01	0.451519174066619
1985-01-01	0.484027117880392
1986-01-01	0.517595765388680
1987-01-01	0.544230455893065
1988-01-01	0.559657309553583
1989-01-01	0.516904212783450
1990-01-01	0.523428169941888
1991-01-01	0.513011507240948
1992-01-01	0.494935285019571
1993-01-01	0.505899743608580
1994-01-01	0.497129248621863
1995-01-01	0.487364256254887
1996-01-01	0.482793402331375
1997-01-01	0.499563694357866
1998-01-01	0.554545306969549
1999-01-01	0.571219395607513
2000-01-01	0.557167308631413
2001-01-01	0.574775122293954
2002-01-01	0.592329870338095
2003-01-01	0.589131295275738
2004-01-01	0.595328112143612
2005-01-01	0.632227559199308
2006-01-01	0.731910262431261
2007-01-01	0.817724006460929
2008-01-01	0.894560771801486
2009-01-01	0.940000822511259
2010-01-01	1.000000000000000