Year Percent 2011-01-01 6.808210000000001 2012-01-01 6.808210000000001 2013-01-01 6.808210000000001 2014-01-01 14.876000000000000 2015-01-01 14.876000000000000 2016-01-01 14.876000000000000 2017-01-01 22.194200000000000