Year Percent 2011-01-01 7.9326899999999990 2012-01-01 7.9326899999999990 2013-01-01 7.9326899999999990 2014-01-01 10.1591000000000000 2015-01-01 10.1591000000000000 2016-01-01 10.1591000000000000 2017-01-01 1.8121099999999999