Year Number 2004-01-01 525.8888 2005-01-01 504.6406 2006-01-01 550.0259 2007-01-01 609.0066 2008-01-01 589.3841 2009-01-01 600.7827 2010-01-01 590.9591 2011-01-01 591.3113 2012-01-01 603.4848 2013-01-01 722.4048 2014-01-01 758.0022 2015-01-01 737.4182 2016-01-01 739.5978 2017-01-01 874.9750