Year Percent 2011-01-01 3.503190000000000 2012-01-01 3.503190000000000 2013-01-01 3.503190000000000 2014-01-01 3.515860000000000 2015-01-01 3.515860000000000 2016-01-01 3.515860000000000 2017-01-01 6.576219999999999