Year Percent 2011-01-01 4.470350000000000 2012-01-01 4.470350000000000 2013-01-01 4.470350000000000 2014-01-01 13.567100000000000 2015-01-01 13.567100000000000 2016-01-01 13.567100000000000 2017-01-01 16.644000000000002