Year	Index 2010=1
1988-01-01	0.657579350498688
1989-01-01	0.698050169790555
1990-01-01	0.685415698819103
1991-01-01	0.688709879254684
1992-01-01	0.698142679331346
1993-01-01	0.695924687268778
1994-01-01	0.686005462869266
1995-01-01	0.691694626773954
1996-01-01	0.703435770025842
1997-01-01	0.721239355833735
1998-01-01	0.757443705947470
1999-01-01	0.762181892778925
2000-01-01	0.757073118965381
2001-01-01	0.784211247389560
2002-01-01	0.818133501173664
2003-01-01	0.830154356340674
2004-01-01	0.833600643798149
2005-01-01	0.861766290063048
2006-01-01	0.881086602271993
2007-01-01	0.916283911901717
2008-01-01	0.992721600588928
2009-01-01	1.029308200985590
2010-01-01	1.000000000000000