Year Number 2004-01-01 64.8212 2005-01-01 87.2833 2006-01-01 141.1666 2007-01-01 267.9443 2008-01-01 382.9520 2009-01-01 347.9827 2010-01-01 414.7266 2011-01-01 572.8508 2012-01-01 585.7328 2013-01-01 772.9899 2014-01-01 920.6796 2015-01-01 954.8648 2016-01-01 1027.3188