Year Percent 2006-01-01 48.9 2007-01-01 48.9 2008-01-01 48.9 2009-01-01 48.9 2010-01-01 53.1 2011-01-01 53.1 2012-01-01 53.1 2013-01-01 53.1 2014-01-01 53.1 2015-01-01 53.1 2016-01-01 40.2