Year Percent 2011-01-01 1.7265200000000000 2012-01-01 1.7265200000000000 2013-01-01 1.7265200000000000 2014-01-01 1.9973400000000001 2015-01-01 1.9973400000000001 2016-01-01 1.9973400000000001 2017-01-01 7.6130700000000000