Year Percent 2011-01-01 8.251170000000000 2012-01-01 8.251170000000000 2013-01-01 8.251170000000000 2014-01-01 13.298900000000000 2015-01-01 13.298900000000000 2016-01-01 13.298900000000000 2017-01-01 14.154000000000002