Year Percent 2011-01-01 2.0361599999999997 2012-01-01 2.0361599999999997 2013-01-01 2.0361599999999997 2014-01-01 2.8744800000000000 2015-01-01 2.8744800000000000 2016-01-01 2.8744800000000000 2017-01-01 6.4572600000000000