Year Percent 2007-01-01 5.8 2008-01-01 5.8 2009-01-01 5.8 2010-01-01 12.2 2011-01-01 12.2 2012-01-01 12.2 2013-01-01 12.2 2014-01-01 12.2 2015-01-01 12.2 2016-01-01 13.8