Year Number 2007-01-01 681.5968 2008-01-01 1565.8963 2009-01-01 1369.6072 2010-01-01 1495.3488 2011-01-01 1697.1151 2012-01-01 1785.7703 2013-01-01 1608.6045 2014-01-01 1659.2623 2015-01-01 1402.2794 2016-01-01 1757.9931 2017-01-01 1358.7762