Year Percent 2011-01-01 7.558860000000001 2012-01-01 7.558860000000001 2013-01-01 7.558860000000001 2014-01-01 10.409100000000000 2015-01-01 10.409100000000000 2016-01-01 10.409100000000000 2017-01-01 5.748980000000000