Year	Index
1960-01-01	12.090
1961-01-01	12.020
1962-01-01	13.540
1963-01-01	14.645
1964-01-01	11.105
1965-01-01	8.825
1966-01-01	10.530
1967-01-01	10.540
1968-01-01	9.565
1969-01-01	10.500
1970-01-01	13.630
1971-01-01	14.480
1972-01-01	15.140
1973-01-01	15.540
1974-01-01	17.340
1975-01-01	20.970
1976-01-01	14.890
1977-01-01	10.450
1978-01-01	10.230
1979-01-01	12.060
1980-01-01	16.020
1981-01-01	16.290
1982-01-01	16.380
1983-01-01	16.270
1984-01-01	13.700
1985-01-01	11.970
1986-01-01	12.850
1987-01-01	17.980
1988-01-01	28.010
1989-01-01	17.650
1990-01-01	19.410
1991-01-01	22.520
1992-01-01	17.930
1993-01-01	18.260
1994-01-01	17.790
1995-01-01	17.090
1996-01-01	15.450
1997-01-01	16.180
1998-01-01	22.580
1999-01-01	26.470
2000-01-01	22.590
2001-01-01	22.205
2002-01-01	22.380
2003-01-01	20.590
2004-01-01	18.150
2005-01-01	14.790
2006-01-01	16.125
2007-01-01	18.000
2008-01-01	23.520
2009-01-01	35.555
2010-01-01	26.340
2011-01-01	17.700
2012-01-01	19.230
2013-01-01	14.775
2014-01-01	13.740
2015-01-01	14.745