Year Number 2009-01-01 56.8182 2010-01-01 56.8182 2011-01-01 54.5455 2012-01-01 54.5455 2013-01-01 54.5455 2014-01-01 50.0000 2015-01-01 47.7273 2016-01-01 47.7273 2017-01-01 40.9091