Year	Number
2004-01-01	0.8273
2005-01-01	0.7531
2006-01-01	0.7531
2007-01-01	0.7531
2008-01-01	0.7531
2009-01-01	0.7531
2010-01-01	0.8273
2011-01-01	0.8273
2012-01-01	0.8061
2013-01-01	0.8273
2014-01-01	0.8061
2015-01-01	0.8167