Year Number 2006-01-01 5.8912 2007-01-01 18.6997 2008-01-01 21.4833 2009-01-01 24.5444 2010-01-01 25.4721 2011-01-01 31.1691 2012-01-01 28.8480 2013-01-01 27.3317 2014-01-01 206.3111 2015-01-01 26.6875