Year Percent 2011-01-01 1.4984600000000001 2012-01-01 1.4984600000000001 2013-01-01 1.4984600000000001 2014-01-01 2.1566600000000000 2015-01-01 2.1566600000000000 2016-01-01 2.1566600000000000 2017-01-01 3.0075900000000000