Year	Index
1997-01-01	13.797600000000000
1998-01-01	20.345700000000000
1999-01-01	28.982100000000000
2000-01-01	21.084900000000000
2001-01-01	20.875000000000000
2002-01-01	22.276999999999997
2003-01-01	23.578900000000000
2004-01-01	17.301900000000000
2005-01-01	14.655500000000000
2006-01-01	20.706900000000000
2007-01-01	23.612400000000000
2008-01-01	29.035999999999998
2009-01-01	51.085000000000000
2010-01-01	36.008100000000000
2011-01-01	23.971300000000000
2012-01-01	25.591400000000000
2013-01-01	17.983600000000000
2014-01-01	12.439200000000000
2015-01-01	16.658600000000000
2016-01-01	22.076600000000000
2017-01-01	17.740500000000000