Year Percent 2011-01-01 96.98390000000000 2012-01-01 96.98390000000000 2013-01-01 96.98390000000000 2014-01-01 96.58280000000000 2015-01-01 96.58280000000000 2016-01-01 96.58280000000000 2017-01-01 94.00399999999999