Year Number 2005-01-01 19.2986 2006-01-01 33.6955 2007-01-01 58.6195 2008-01-01 76.6226 2009-01-01 67.3994 2010-01-01 76.2474 2011-01-01 108.5978 2012-01-01 149.5390 2013-01-01 235.5854 2014-01-01 287.9897