Year Number 2006-01-01 362.4340 2007-01-01 365.9967 2008-01-01 374.9900 2009-01-01 365.5420 2010-01-01 357.7742 2011-01-01 352.8385 2012-01-01 369.7444 2013-01-01 421.8818 2014-01-01 431.0199 2015-01-01 440.3797