Year Number 2004-01-01 66.16223854 2005-01-01 72.18937434 2006-01-01 73.89258907 2007-01-01 77.82735768 2008-01-01 76.27756914 2009-01-01 75.95402422 2010-01-01 84.79691534 2011-01-01 88.41643217 2012-01-01 50.27472018 2013-01-01 79.99539927 2014-01-01 89.45888528