Year	Index 2005=1
1970-01-01	0.232
1971-01-01	0.234
1972-01-01	0.235
1973-01-01	0.235
1974-01-01	0.235
1975-01-01	0.233
1976-01-01	0.233
1977-01-01	0.235
1978-01-01	0.238
1979-01-01	0.247
1980-01-01	0.256
1981-01-01	0.261
1982-01-01	0.260
1983-01-01	0.263
1984-01-01	0.276
1985-01-01	0.304
1986-01-01	0.318
1987-01-01	0.335
1988-01-01	0.375
1989-01-01	0.407
1990-01-01	0.431
1991-01-01	0.464
1992-01-01	0.502
1993-01-01	0.578
1994-01-01	0.697
1995-01-01	0.792
1996-01-01	0.843
1997-01-01	0.856
1998-01-01	0.848
1999-01-01	0.837
2000-01-01	0.855
2001-01-01	0.872
2002-01-01	0.877
2003-01-01	0.900
2004-01-01	0.962
2005-01-01	1.000
2006-01-01	1.038
2007-01-01	1.117
2008-01-01	1.204
2009-01-01	1.197