Year	Percent
2008-01-01	4.6014800000000005
2009-01-01	4.3026700000000000
2010-01-01	4.3026700000000000
2011-01-01	4.3026700000000000
2012-01-01	4.3026700000000000
2013-01-01	4.3026700000000000
2014-01-01	4.3026700000000000
2015-01-01	4.0816300000000005
2016-01-01	4.2842600000000000