Year	Index
1999-01-01	8.570380000000000
2000-01-01	12.139000000000001
2001-01-01	12.966800000000000
2002-01-01	12.779700000000000
2003-01-01	14.048000000000000
2004-01-01	24.180000000000000
2005-01-01	24.180000000000000
2006-01-01	14.608500000000000
2007-01-01	15.759900000000000
2008-01-01	15.052100000000000
2009-01-01	26.019500000000000
2010-01-01	27.528000000000002
2011-01-01	17.704200000000000
2012-01-01	11.892100000000000
2013-01-01	12.328200000000000
2014-01-01	12.991700000000000
2015-01-01	19.117000000000000
2016-01-01	20.580500000000000
2017-01-01	16.968900000000000