Year Percent 2011-01-01 8.145900000000000 2012-01-01 8.145900000000000 2013-01-01 8.145900000000000 2014-01-01 8.310260000000001 2015-01-01 8.310260000000001 2016-01-01 8.310260000000001 2017-01-01 10.873400000000000