Year Number 2004-01-01 395.9075 2005-01-01 459.2826 2006-01-01 542.9783 2007-01-01 581.8881 2008-01-01 662.2734 2009-01-01 722.2284 2010-01-01 706.7629 2011-01-01 712.8240 2012-01-01 697.2978 2013-01-01 739.0905 2014-01-01 812.9498 2015-01-01 927.7984 2016-01-01 992.5873