Year	Percent
2005-01-01	77.6096237723036
2006-01-01	77.9973629967427
2007-01-01	77.5724298845259
2008-01-01	76.9222782820731
2009-01-01	74.7699032578944
2010-01-01	74.4691556267773
2011-01-01	74.3811670609467
2012-01-01	74.9212281868323
2013-01-01	74.6319292060715
2014-01-01	74.4967331467905
2015-01-01	74.6705471312230
2016-01-01	74.7279395054636
2017-01-01	75.0022602049821