Year Index 2004-01-01 176.7402702181010 2005-01-01 172.9935725514640 2006-01-01 170.9631190102870 2007-01-01 157.4315882917410 2008-01-01 141.9570542105660 2009-01-01 122.2868074125830 2010-01-01 100.0000000000000 2011-01-01 81.9496386541404 2012-01-01 81.4073563561370 2013-01-01 78.3031435296810 2014-01-01 76.5711949965275 2015-01-01 81.7403286504235 2016-01-01 79.3860143789068 2017-01-01 75.6860521350960