Year Number 2005-01-01 339.4654 2006-01-01 414.4010 2007-01-01 443.9186 2008-01-01 500.5284 2009-01-01 535.2811 2010-01-01 604.5947 2011-01-01 627.1554 2012-01-01 668.6371 2013-01-01 741.1160 2014-01-01 869.3946 2015-01-01 865.2877 2016-01-01 877.7607 2017-01-01 961.7502