Year Number 2004-01-01 438.0396 2005-01-01 558.9907 2006-01-01 660.1556 2007-01-01 727.6863 2008-01-01 743.6419 2009-01-01 651.5937 2010-01-01 690.3120 2011-01-01 686.8544 2012-01-01 698.2039 2013-01-01 699.1741 2014-01-01 690.5139 2015-01-01 674.6243 2016-01-01 671.8840