Year Percent 2011-01-01 26.970400000000000 2012-01-01 26.970400000000000 2013-01-01 26.970400000000000 2014-01-01 9.588280000000001 2015-01-01 9.588280000000001 2016-01-01 9.588280000000001 2017-01-01 8.782660000000000