Year	Percent
2003-01-01	74.9175975355429
2004-01-01	73.5024897968169
2005-01-01	75.1616338523932
2006-01-01	75.3698227364998
2007-01-01	75.9872422261007
2008-01-01	75.0080911530521
2009-01-01	72.0972483932026
2010-01-01	71.6130993531697
2011-01-01	71.6465864455394
2012-01-01	72.6878860670396
2013-01-01	73.6874443995818