Year Number 2004-01-01 19.4444 2005-01-01 19.4444 2006-01-01 16.6667 2007-01-01 16.6667 2008-01-01 26.3889 2009-01-01 26.3889 2010-01-01 25.0000 2011-01-01 25.0000 2012-01-01 25.0000 2013-01-01 25.0000 2014-01-01 25.0000 2015-01-01 26.3889