Year Index 2005-01-01 16.2835 2006-01-01 18.7526 2007-01-01 23.0689 2008-01-01 29.6447 2009-01-01 43.1000 2010-01-01 31.8769 2011-01-01 20.9085 2012-01-01 20.2202 2013-01-01 17.3681 2014-01-01 17.1088 2015-01-01 18.2633 2016-01-01 26.9188 2017-01-01 22.6471