Year Number 2004-01-01 99.83077277 2005-01-01 99.42138952 2006-01-01 98.45683526 2007-01-01 98.23981962 2008-01-01 98.42783761 2009-01-01 98.36827591 2010-01-01 98.38829709 2011-01-01 98.36027261 2012-01-01 98.35953483 2013-01-01 98.37371852 2014-01-01 98.41680234