Year	Index
1981-01-01	18.1791
1982-01-01	20.0008
1983-01-01	14.8556
1984-01-01	11.8235
1985-01-01	9.6965
1986-01-01	13.1286
1987-01-01	19.5990
1988-01-01	21.8082
1989-01-01	17.4934
1990-01-01	19.4125
1991-01-01	24.9024
1992-01-01	22.0266
1993-01-01	23.5052
1994-01-01	17.7913
1995-01-01	15.3528
1996-01-01	15.9347
1997-01-01	21.0736
1998-01-01	42.5128
1999-01-01	44.5736
2000-01-01	43.0566
2001-01-01	41.8531
2002-01-01	34.7137
2003-01-01	31.9723
2004-01-01	25.4980
2005-01-01	21.5248
2006-01-01	18.3798
2007-01-01	18.8206
2008-01-01	25.9738
2009-01-01	36.9823
2010-01-01	23.8748
2011-01-01	18.0113
2012-01-01	23.8308
2013-01-01	16.1230
2014-01-01	11.8874
2015-01-01	10.8179
2016-01-01	13.1399
2017-01-01	11.2003