Year	Number
2004-01-01	0.7145
2005-01-01	0.7860
2006-01-01	0.8217
2007-01-01	0.8217
2008-01-01	0.8217
2009-01-01	0.8217
2010-01-01	0.5002
2011-01-01	0.4645
2012-01-01	0.4645
2013-01-01	0.4287
2014-01-01	0.5002
2015-01-01	0.5002
2016-01-01	0.5359