Year Number 2008-01-01 599.5628 2009-01-01 608.7613 2010-01-01 612.7145 2011-01-01 620.3869 2012-01-01 637.3399 2013-01-01 641.7653 2014-01-01 649.0426 2015-01-01 666.6677 2016-01-01 679.9426