Year	Index 2010=1
1981-01-01	0.283779266111538
1982-01-01	0.337853791399288
1983-01-01	0.394133752858887
1984-01-01	0.433608162892238
1985-01-01	0.468542262197301
1986-01-01	0.493739438186839
1987-01-01	0.519597605313629
1988-01-01	0.544460808984755
1989-01-01	0.580528786134792
1990-01-01	0.622447764026160
1991-01-01	0.672365885565316
1992-01-01	0.716770927355587
1993-01-01	0.710543131930447
1994-01-01	0.707262628394838
1995-01-01	0.720030169375359
1996-01-01	0.750874529802992
1997-01-01	0.764015574246867
1998-01-01	0.762452081592474
1999-01-01	0.787716862636364
2000-01-01	0.778989102617393
2001-01-01	0.793054607028591
2002-01-01	0.826004354274914
2003-01-01	0.856814193144630
2004-01-01	0.868074754149749
2005-01-01	0.898599012143695
2006-01-01	0.913220921020927
2007-01-01	0.937915351472097
2008-01-01	0.966886467231865
2009-01-01	0.996776836671699
2010-01-01	1.000000000000000