Year	Index 2010=1
1978-01-01	0.327508440590862
1979-01-01	0.322477059136546
1980-01-01	0.342732014307238
1981-01-01	0.384965013209254
1982-01-01	0.437707929840492
1983-01-01	0.471802602928074
1984-01-01	0.485097387979152
1985-01-01	0.502678714243870
1986-01-01	0.551224770327043
1987-01-01	0.607993838001020
1988-01-01	0.646570607532640
1989-01-01	0.655264727222907
1990-01-01	0.659597596514128
1991-01-01	0.675954107026779
1992-01-01	0.686414336172692
1993-01-01	0.678976370484150
1994-01-01	0.672940414550444
1995-01-01	0.681696581182734
1996-01-01	0.683571504283966
1997-01-01	0.697110555844192
1998-01-01	0.726812662357712
1999-01-01	0.756832636246800
2000-01-01	0.780541087285619
2001-01-01	0.798291595318500
2002-01-01	0.818447125446408
2003-01-01	0.814462384136578
2004-01-01	0.816493661059442
2005-01-01	0.828138049055774
2006-01-01	0.830002761058818
2007-01-01	0.876118941868118
2008-01-01	0.948687617286563
2009-01-01	0.983095970448344
2010-01-01	1.000000000000000