Year Number 2005-01-01 32.7024 2006-01-01 33.4734 2007-01-01 47.8938 2008-01-01 46.1018 2009-01-01 44.5572 2010-01-01 49.0686 2011-01-01 47.9356 2012-01-01 48.2601 2013-01-01 280.7000