Year Percent 2011-01-01 8.243280000000000 2012-01-01 8.243280000000000 2013-01-01 8.243280000000000 2014-01-01 7.053999999999999 2015-01-01 7.053999999999999 2016-01-01 7.053999999999999 2017-01-01 8.697289999999999