Year	Index
1989-01-01	39.4932
1990-01-01	50.2034
1991-01-01	57.3535
1992-01-01	51.0152
1993-01-01	39.7920
1994-01-01	55.4508
1995-01-01	50.5905
1996-01-01	39.8602
1997-01-01	39.8230
1998-01-01	51.8281
1999-01-01	64.4303
2000-01-01	57.6050
2001-01-01	64.3352
2002-01-01	55.6571
2003-01-01	44.9659
2004-01-01	37.7932
2005-01-01	27.7946
2006-01-01	27.0921
2007-01-01	28.5074
2008-01-01	32.6806
2009-01-01	39.9240
2010-01-01	29.0711
2011-01-01	23.9092
2012-01-01	24.7507
2013-01-01	22.3167
2014-01-01	27.7017
2015-01-01	21.6843
2016-01-01	22.3724
2017-01-01	19.5572