Year Number 2005-01-01 759.5402 2006-01-01 771.0828 2007-01-01 787.4722 2008-01-01 829.2714 2009-01-01 857.5848 2010-01-01 858.9949 2011-01-01 843.2927 2012-01-01 775.6525 2013-01-01 699.7277 2014-01-01 670.7088 2015-01-01 652.0583 2016-01-01 622.4913 2017-01-01 630.4591