Year Number 2008-01-01 653.7287 2009-01-01 731.4367 2010-01-01 577.0877 2011-01-01 554.1370 2012-01-01 601.3293 2013-01-01 617.9788 2014-01-01 613.0634 2015-01-01 620.4898 2016-01-01 379.9032