Year Number 2005-01-01 96.93679682 2006-01-01 96.47226251 2007-01-01 96.78782074 2008-01-01 96.76090522 2009-01-01 92.80280538 2010-01-01 91.78709583 2011-01-01 92.31406723 2012-01-01 91.98129471 2013-01-01 92.53079960 2014-01-01 92.64128835