Year Number 2005-01-01 68.1752 2006-01-01 70.6956 2007-01-01 75.8475 2008-01-01 179.0329 2009-01-01 176.8282 2010-01-01 192.1888 2011-01-01 223.7719 2012-01-01 277.7245 2013-01-01 342.6639