Year Number 2005-01-01 12.5662 2006-01-01 14.8697 2007-01-01 15.3823 2008-01-01 15.4693 2009-01-01 16.3304 2010-01-01 20.0128 2011-01-01 25.1446 2012-01-01 43.2089 2013-01-01 96.1181